diff --git a/src/lib/components/Wizard.svelte b/src/lib/components/Wizard.svelte
index 5b7a100..d6bbc2f 100644
--- a/src/lib/components/Wizard.svelte
+++ b/src/lib/components/Wizard.svelte
@@ -3,18 +3,21 @@
   import StepAuth from './wizard/StepAuth.svelte';
   import StepSheetSearch from './wizard/StepSheetSearch.svelte';
   import StepColumnMap from './wizard/StepColumnMap.svelte';
+  import StepRowFilter from './wizard/StepRowFilter.svelte';
   // Additional steps to be added as they are implemented
 
   const steps = [
     StepAuth,
     StepSheetSearch,
-    StepColumnMap
+    StepColumnMap,
+    StepRowFilter
   ];
 
   const stepTitles = [
     'Authenticate',
     'Select Sheet',
-    'Map Columns'
+    'Map Columns',
+    'Filter Rows'
   ];
 
   function goToPreviousStep() {
diff --git a/src/lib/components/wizard/StepColumnMap.svelte b/src/lib/components/wizard/StepColumnMap.svelte
index 01f1412..3795593 100644
--- a/src/lib/components/wizard/StepColumnMap.svelte
+++ b/src/lib/components/wizard/StepColumnMap.svelte
@@ -17,7 +17,8 @@
     { key: 'surname', label: 'Last Name', required: true },
     { key: 'nationality', label: 'Nationality', required: true },
     { key: 'birthday', label: 'Birthday', required: true },
-    { key: 'pictureUrl', label: 'Photo URL', required: true }
+    { key: 'pictureUrl', label: 'Photo URL', required: true },
+    { key: 'alreadyPrinted', label: 'Already Printed', required: false }
   ];
 
   let mappedIndices = {
@@ -25,7 +26,8 @@
     surname: -1,
     nationality: -1,
     birthday: -1,
-    pictureUrl: -1
+    pictureUrl: -1,
+    alreadyPrinted: -1
   };
 
   // Load available sheets when component mounts
@@ -63,7 +65,8 @@
       surname: -1,
       nationality: -1,
       birthday: -1,
-      pictureUrl: -1
+      pictureUrl: -1,
+      alreadyPrinted: -1
     };
     mappingComplete = false;
     
@@ -112,7 +115,8 @@
       surname: -1,
       nationality: -1,
       birthday: -1,
-      pictureUrl: -1
+      pictureUrl: -1,
+      alreadyPrinted: -1
     };
     
     // Auto-mapping patterns
@@ -121,7 +125,8 @@
       surname: /last[\s_-]*name|surname|family[\s_-]*name|nachname/i,
       nationality: /nationality|country|nation/i,
       birthday: /birth|date[\s_-]*of[\s_-]*birth|birthday|dob/i,
-      pictureUrl: /photo|picture|image|url|avatar/i
+      pictureUrl: /photo|picture|image|url|avatar/i,
+      alreadyPrinted: /already[\s_-]*printed|printed|status/i
     };
     
     sheetHeaders.forEach((header, index) => {
@@ -133,6 +138,27 @@
       }
     });
     
+    // If "Already Printed" column wasn't found, try to find the first empty column
+    if (mappedIndices.alreadyPrinted === -1 && previewData.length > 0) {
+      // Check up to 26 columns (A-Z) or the number of headers, whichever is larger
+      const maxColumns = Math.max(sheetHeaders.length, 26);
+      
+      for (let colIndex = 0; colIndex < maxColumns; colIndex++) {
+        // Check if this column is empty (all preview rows are empty for this column)
+        const isEmpty = previewData.every(row => !row[colIndex] || String(row[colIndex]).trim() === '');
+        
+        // Also check if this column isn't already mapped to another field
+        const isAlreadyMapped = Object.entries(mappedIndices).some(([field, index]) => 
+          field !== 'alreadyPrinted' && index === colIndex
+        );
+        
+        if (isEmpty && !isAlreadyMapped) {
+          mappedIndices.alreadyPrinted = colIndex;
+          break;
+        }
+      }
+    }
+    
     updateMappingStatus();
   }
 
@@ -156,7 +182,8 @@
             surname: savedSheet.columnMapping.surname ?? -1,
             nationality: savedSheet.columnMapping.nationality ?? -1,
             birthday: savedSheet.columnMapping.birthday ?? -1,
-            pictureUrl: savedSheet.columnMapping.pictureUrl ?? -1
+            pictureUrl: savedSheet.columnMapping.pictureUrl ?? -1,
+            alreadyPrinted: savedSheet.columnMapping.alreadyPrinted ?? -1
           };
           
           updateMappingStatus();
@@ -173,7 +200,16 @@
   }
 
   function updateMappingStatus() {
-    mappingComplete = Object.values(mappedIndices).every(index => index !== -1);
+    // Only check required fields for completion
+    const requiredIndices = {
+      name: mappedIndices.name,
+      surname: mappedIndices.surname,
+      nationality: mappedIndices.nationality,
+      birthday: mappedIndices.birthday,
+      pictureUrl: mappedIndices.pictureUrl
+    };
+    
+    mappingComplete = Object.values(requiredIndices).every(index => index !== -1);
     
     // Update the column mapping store
     columnMapping.set({
@@ -181,7 +217,8 @@
       surname: mappedIndices.surname,
       nationality: mappedIndices.nationality,
       birthday: mappedIndices.birthday,
-      pictureUrl: mappedIndices.pictureUrl
+      pictureUrl: mappedIndices.pictureUrl,
+      alreadyPrinted: mappedIndices.alreadyPrinted
     });
   }
 
@@ -204,7 +241,8 @@
         surname: mappedIndices.surname,
         nationality: mappedIndices.nationality,
         birthday: mappedIndices.birthday,
-        pictureUrl: mappedIndices.pictureUrl
+        pictureUrl: mappedIndices.pictureUrl,
+        alreadyPrinted: mappedIndices.alreadyPrinted
       };
       
       if (sheetIndex !== -1) {
@@ -370,8 +408,13 @@
                     class="w-full px-3 py-2 border border-gray-300 rounded-md bg-white text-gray-900 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
                   >
                     <option value={-1}>-- Select column --</option>
-                    {#each sheetHeaders as header, index}
-                      <option value={index}>{header}</option>
+                    {#each Array.from({length: Math.max(sheetHeaders.length, 26)}, (_, i) => i) as index}
+                      <option value={index}>
+                        {sheetHeaders[index] || `Column ${String.fromCharCode(65 + index)}`}
+                        {#if !sheetHeaders[index]}
+                          (empty)
+                        {/if}
+                      </option>
                     {/each}
                   </select>
                 </div>
@@ -387,10 +430,10 @@
                 <table class="min-w-full divide-y divide-gray-200 border border-gray-200 rounded-lg">
                   <thead class="bg-gray-50">
                     <tr>
-                      {#each sheetHeaders as header, index}
+                      {#each Array.from({length: Math.max(sheetHeaders.length, previewData[0]?.length || 0, 26)}, (_, i) => i) as index}
                         <th class="px-3 py-2 text-left text-xs font-medium text-gray-500 uppercase tracking-wider
                                    {Object.values(mappedIndices).includes(index) ? 'bg-blue-100' : ''}">
-                          {header}
+                          {sheetHeaders[index] || `Column ${String.fromCharCode(65 + index)}`}
                           {#if Object.values(mappedIndices).includes(index)}
                             <div class="text-blue-600 text-xs mt-1">
                               {requiredFields.find(f => mappedIndices[f.key] === index)?.label}
@@ -403,10 +446,10 @@
                   <tbody class="bg-white divide-y divide-gray-200">
                     {#each previewData as row}
                       <tr>
-                        {#each row as cell, index}
+                        {#each Array.from({length: Math.max(sheetHeaders.length, row.length, 26)}, (_, i) => i) as index}
                           <td class="px-3 py-2 text-sm text-gray-500 max-w-xs truncate
                                      {Object.values(mappedIndices).includes(index) ? 'bg-blue-50' : ''}">
-                            {cell}
+                            {row[index] || ''}
                           </td>
                         {/each}
                       </tr>
diff --git a/src/lib/components/wizard/StepRowFilter.svelte b/src/lib/components/wizard/StepRowFilter.svelte
index 79c4b4b..d3c0527 100644
--- a/src/lib/components/wizard/StepRowFilter.svelte
+++ b/src/lib/components/wizard/StepRowFilter.svelte
@@ -1,4 +1,401 @@
+<script lang="ts">
+  import { selectedSheet, columnMapping, rawSheetData, filteredSheetData, currentStep } from '$lib/stores';
+  import { onMount } from 'svelte';
+
+  let searchTerm = '';
+  let sortColumn = '';
+  let sortDirection: 'asc' | 'desc' = 'asc';
+  let selectedRows = new Set<number>();
+  let selectAll = false;
+  let processedData: any[] = [];
+  let filteredData: any[] = [];
+  let headers: string[] = [];
+
+  $: {
+    // Filter data based on search term
+    if (searchTerm.trim()) {
+      filteredData = processedData.filter(row =>
+        Object.values(row).some(value => 
+          String(value).toLowerCase().includes(searchTerm.toLowerCase())
+        )
+      );
+    } else {
+      filteredData = processedData;
+    }
+  }
+
+  $: {
+    // Sort data if sort column is selected
+    if (sortColumn && filteredData.length > 0) {
+      filteredData = [...filteredData].sort((a, b) => {
+        const aVal = String(a[sortColumn]).toLowerCase();
+        const bVal = String(b[sortColumn]).toLowerCase();
+        
+        if (sortDirection === 'asc') {
+          return aVal.localeCompare(bVal);
+        } else {
+          return bVal.localeCompare(aVal);
+        }
+      });
+    }
+  }
+
+  onMount(() => {
+    processSheetData();
+  });
+
+  function processSheetData() {
+    if (!$rawSheetData || $rawSheetData.length === 0 || !$columnMapping) {
+      return;
+    }
+
+    // Get headers from the mapping
+    headers = Object.keys($columnMapping);
+    
+    // Process the data starting from row 2 (skip header row)
+    processedData = $rawSheetData.slice(1).map((row, index) => {
+      const processedRow: any = {
+        _rowIndex: index + 1, // Store original row index
+        _isValid: true
+      };
+
+      // Map each column according to the column mapping
+      for (const [field, columnIndex] of Object.entries($columnMapping)) {
+        if (columnIndex !== -1 && columnIndex !== undefined && columnIndex < row.length) {
+          processedRow[field] = row[columnIndex] || '';
+        } else {
+          processedRow[field] = '';
+          // Only mark as invalid if it's a required field
+          if (field !== 'alreadyPrinted') {
+            processedRow._isValid = false;
+          }
+        }
+      }
+
+      // Check if all required fields have values (excluding alreadyPrinted)
+      const requiredFields = ['name', 'surname', 'nationality', 'birthday', 'pictureUrl'];
+      const hasAllRequiredFields = requiredFields.every(field => 
+        processedRow[field] && String(processedRow[field]).trim() !== ''
+      );
+      
+      if (!hasAllRequiredFields) {
+        processedRow._isValid = false;
+      }
+
+      return processedRow;
+    });
+
+    // Initially select rows based on validity and "Already Printed" status
+    selectedRows = new Set(
+      processedData
+        .filter(row => {
+          if (!row._isValid) return false;
+          
+          // Check "Already Printed" column value
+          const alreadyPrinted = row.alreadyPrinted;
+          if (alreadyPrinted) {
+            const value = String(alreadyPrinted).toLowerCase().trim();
+            // If the value is "true", "yes", "1", or any truthy value, don't select
+            return !(value === 'true' || value === 'yes' || value === '1' || value === 'x');
+          }
+          
+          // If empty or falsy, select the row
+          return true;
+        })
+        .map(row => row._rowIndex)
+    );
+    
+    updateSelectAllState();
+  }
+
+  function toggleRowSelection(rowIndex: number) {
+    if (selectedRows.has(rowIndex)) {
+      selectedRows.delete(rowIndex);
+    } else {
+      selectedRows.add(rowIndex);
+    }
+    selectedRows = new Set(selectedRows); // Trigger reactivity
+    updateSelectAllState();
+  }
+
+  function toggleSelectAll() {
+    if (selectAll) {
+      // Deselect all visible valid rows that aren't already printed
+      filteredData.forEach(row => {
+        if (row._isValid && !isRowAlreadyPrinted(row)) {
+          selectedRows.delete(row._rowIndex);
+        }
+      });
+    } else {
+      // Select all visible valid rows that aren't already printed
+      filteredData.forEach(row => {
+        if (row._isValid && !isRowAlreadyPrinted(row)) {
+          selectedRows.add(row._rowIndex);
+        }
+      });
+    }
+    selectedRows = new Set(selectedRows);
+    updateSelectAllState();
+  }
+
+  function updateSelectAllState() {
+    const visibleValidUnprintedRows = filteredData.filter(row => row._isValid && !isRowAlreadyPrinted(row));
+    const selectedVisibleValidUnprintedRows = visibleValidUnprintedRows.filter(row => selectedRows.has(row._rowIndex));
+    
+    selectAll = visibleValidUnprintedRows.length > 0 && selectedVisibleValidUnprintedRows.length === visibleValidUnprintedRows.length;
+  }
+
+  function handleSort(column: string) {
+    if (sortColumn === column) {
+      sortDirection = sortDirection === 'asc' ? 'desc' : 'asc';
+    } else {
+      sortColumn = column;
+      sortDirection = 'asc';
+    }
+  }
+
+  function getFieldLabel(field: string): string {
+    const labels = {
+      name: 'First Name',
+      surname: 'Last Name',
+      nationality: 'Nationality',
+      birthday: 'Birthday',
+      pictureUrl: 'Photo URL',
+      alreadyPrinted: 'Already Printed'
+    };
+    return labels[field] || field;
+  }
+
+  function isRowAlreadyPrinted(row: any): boolean {
+    const alreadyPrinted = row.alreadyPrinted;
+    if (!alreadyPrinted) return false;
+    
+    const value = String(alreadyPrinted).toLowerCase().trim();
+    return value === 'true' || value === 'yes' || value === '1' || value === 'x';
+  }
+
+  function handleContinue() {
+    // Filter the data to only include selected rows
+    const selectedData = processedData.filter(row => 
+      selectedRows.has(row._rowIndex) && row._isValid
+    );
+    
+    // Store the filtered data
+    filteredSheetData.set(selectedData);
+    
+    // Move to next step
+    currentStep.set(5);
+  }
+
+  $: selectedValidCount = Array.from(selectedRows).filter(rowIndex => {
+    const row = processedData.find(r => r._rowIndex === rowIndex);
+    return row && row._isValid;
+  }).length;
+</script>
+
 <div class="p-6">
-  <h2 class="text-xl font-semibold text-gray-900">Filter Rows</h2>
-  <p class="text-sm text-gray-700">Row filtering functionality will be implemented here.</p>
+  <div class="max-w-4xl mx-auto">
+    <div class="mb-6">
+      <h2 class="text-xl font-semibold text-gray-900 mb-2">
+        Filter and Select Rows
+      </h2>
+      
+      <p class="text-sm text-gray-700 mb-4">
+        Review your data and select which rows you want to include in the card generation. 
+        Only rows with all required fields will be available for selection.
+      </p>
+    </div>
+
+    <!-- Search and Filter Controls -->
+    <div class="bg-gray-50 border border-gray-200 rounded-lg p-4 mb-6">
+      <div class="flex flex-col sm:flex-row gap-4">
+        <!-- Search -->
+        <div class="flex-grow">
+          <label for="search" class="block text-sm font-medium text-gray-700 mb-2">
+            Search rows
+          </label>
+          <input
+            id="search"
+            type="text"
+            bind:value={searchTerm}
+            placeholder="Search in any field..."
+            class="w-full px-3 py-2 border border-gray-300 rounded-md bg-white text-gray-900 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
+          />
+        </div>
+
+        <!-- Sort -->
+        <div class="sm:w-48">
+          <label for="sort" class="block text-sm font-medium text-gray-700 mb-2">
+            Sort by
+          </label>
+          <select
+            id="sort"
+            bind:value={sortColumn}
+            class="w-full px-3 py-2 border border-gray-300 rounded-md bg-white text-gray-900 focus:outline-none focus:ring-2 focus:ring-blue-500 focus:border-blue-500"
+          >
+            <option value="">No sorting</option>
+            {#each headers as header}
+              <option value={header}>{getFieldLabel(header)}</option>
+            {/each}
+          </select>
+        </div>
+      </div>
+
+      <!-- Stats -->
+      <div class="mt-4 flex flex-wrap gap-4 text-sm text-gray-600">
+        <span>Total rows: {processedData.length}</span>
+        <span>Valid rows: {processedData.filter(row => row._isValid).length}</span>
+        <span class="text-orange-600">Already printed: {processedData.filter(row => isRowAlreadyPrinted(row)).length}</span>
+        <span>Filtered rows: {filteredData.length}</span>
+        <span class="font-medium text-blue-600">Selected: {selectedValidCount}</span>
+      </div>
+    </div>
+
+    <!-- Data Table -->
+    <div class="bg-white border border-gray-200 rounded-lg overflow-hidden mb-6">
+      {#if filteredData.length === 0}
+        <div class="text-center py-12">
+          <svg class="mx-auto h-12 w-12 text-gray-400" fill="none" viewBox="0 0 24 24" stroke="currentColor">
+            <path stroke-linecap="round" stroke-linejoin="round" stroke-width="2" d="M9 12h6m-6 4h6m2 5H7a2 2 0 01-2-2V5a2 2 0 012-2h5.586a1 1 0 01.707.293l5.414 5.414a1 1 0 01.293.707V19a2 2 0 01-2 2z"/>
+          </svg>
+          <h3 class="mt-2 text-sm font-medium text-gray-900">No data found</h3>
+          <p class="mt-1 text-sm text-gray-500">
+            {searchTerm ? 'No rows match your search criteria.' : 'No data available to display.'}
+          </p>
+        </div>
+      {:else}
+        <div class="overflow-x-auto">
+          <table class="min-w-full divide-y divide-gray-200">
+            <thead class="bg-gray-50">
+              <tr>
+                <!-- Select All Checkbox -->
+                <th class="px-3 py-3 text-left">
+                  <input
+                    type="checkbox"
+                    bind:checked={selectAll}
+                    on:change={toggleSelectAll}
+                    class="w-4 h-4 text-blue-600 border-gray-300 rounded focus:ring-blue-500"
+                  />
+                </th>
+                
+                <!-- Column Headers -->
+                {#each headers as header}
+                  <th 
+                    class="px-3 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider cursor-pointer hover:bg-gray-100"
+                    on:click={() => handleSort(header)}
+                  >
+                    <div class="flex items-center space-x-1">
+                      <span>{getFieldLabel(header)}</span>
+                      {#if sortColumn === header}
+                        <svg class="w-4 h-4" fill="currentColor" viewBox="0 0 20 20">
+                          {#if sortDirection === 'asc'}
+                            <path fill-rule="evenodd" d="M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z" clip-rule="evenodd"/>
+                          {:else}
+                            <path fill-rule="evenodd" d="M14.707 12.707a1 1 0 01-1.414 0L10 9.414l-3.293 3.293a1 1 0 01-1.414-1.414l4-4a1 1 0 011.414 0l4 4a1 1 0 010 1.414z" clip-rule="evenodd"/>
+                          {/if}
+                        </svg>
+                      {/if}
+                    </div>
+                  </th>
+                {/each}
+                
+                <!-- Status Column -->
+                <th class="px-3 py-3 text-left text-xs font-medium text-gray-500 uppercase tracking-wider">
+                  Status
+                </th>
+              </tr>
+            </thead>
+            <tbody class="bg-white divide-y divide-gray-200">
+              {#each filteredData as row}
+                <tr class="hover:bg-gray-50 {!row._isValid ? 'opacity-50' : ''} {isRowAlreadyPrinted(row) ? 'bg-orange-50' : ''}">
+                  <!-- Selection Checkbox -->
+                  <td class="px-3 py-4">
+                    {#if row._isValid}
+                      <input
+                        type="checkbox"
+                        checked={selectedRows.has(row._rowIndex)}
+                        on:change={() => toggleRowSelection(row._rowIndex)}
+                        class="w-4 h-4 text-blue-600 border-gray-300 rounded focus:ring-blue-500"
+                        disabled={isRowAlreadyPrinted(row)}
+                      />
+                      {#if isRowAlreadyPrinted(row)}
+                        <div class="text-xs text-orange-600 mt-1">Already printed</div>
+                      {/if}
+                    {:else}
+                      <div class="w-4 h-4 bg-gray-200 rounded"></div>
+                    {/if}
+                  </td>
+                  
+                  <!-- Data Columns -->
+                  {#each headers as header}
+                    <td class="px-3 py-4 text-sm text-gray-900 max-w-xs truncate">
+                      {#if header === 'alreadyPrinted'}
+                        {#if isRowAlreadyPrinted(row)}
+                          <span class="inline-flex px-2 py-1 text-xs font-medium bg-orange-100 text-orange-800 rounded-full">
+                            Already Printed
+                          </span>
+                        {:else}
+                          <span class="inline-flex px-2 py-1 text-xs font-medium bg-gray-100 text-gray-600 rounded-full">
+                            Not Printed
+                          </span>
+                        {/if}
+                      {:else}
+                        {row[header] || ''}
+                      {/if}
+                    </td>
+                  {/each}
+                  
+                  <!-- Status Column -->
+                  <td class="px-3 py-4 text-sm">
+                    <div class="flex flex-col space-y-1">
+                      {#if row._isValid}
+                        <span class="inline-flex px-2 py-1 text-xs font-medium bg-green-100 text-green-800 rounded-full">
+                          Valid
+                        </span>
+                      {:else}
+                        <span class="inline-flex px-2 py-1 text-xs font-medium bg-red-100 text-red-800 rounded-full">
+                          Missing data
+                        </span>
+                      {/if}
+                      
+                      {#if isRowAlreadyPrinted(row)}
+                        <span class="inline-flex px-2 py-1 text-xs font-medium bg-orange-100 text-orange-800 rounded-full">
+                          Already Printed
+                        </span>
+                      {/if}
+                    </div>
+                  </td>
+                </tr>
+              {/each}
+            </tbody>
+          </table>
+        </div>
+      {/if}
+    </div>
+
+    <!-- Selection Summary -->
+    {#if selectedValidCount > 0}
+      <div class="bg-blue-50 border border-blue-200 rounded-lg p-4 mb-6">
+        <div class="flex items-center">
+          <svg class="w-5 h-5 text-blue-600 mr-2" fill="currentColor" viewBox="0 0 20 20">
+            <path fill-rule="evenodd" d="M10 18a8 8 0 100-16 8 8 0 000 16zm3.707-9.293a1 1 0 00-1.414-1.414L9 10.586 7.707 9.293a1 1 0 00-1.414 1.414l2 2a1 1 0 001.414 0l4-4z" clip-rule="evenodd"/>
+          </svg>
+          <span class="text-sm text-blue-800">
+            <strong>{selectedValidCount}</strong> {selectedValidCount === 1 ? 'row' : 'rows'} selected for card generation
+          </span>
+        </div>
+      </div>
+    {/if}
+
+    <!-- Navigation -->
+    <div class="flex justify-end">
+      <button
+        on:click={handleContinue}
+        disabled={selectedValidCount === 0}
+        class="px-4 py-2 bg-blue-600 text-white rounded-lg font-medium hover:bg-blue-700 disabled:bg-gray-400 disabled:cursor-not-allowed"
+      >
+        {selectedValidCount > 0 ? `Continue with ${selectedValidCount} ${selectedValidCount === 1 ? 'row' : 'rows'} →` : 'Select rows to continue'}
+      </button>
+    </div>
+  </div>
 </div>
diff --git a/src/lib/stores.ts b/src/lib/stores.ts
index 0c67e0a..4bebbea 100644
--- a/src/lib/stores.ts
+++ b/src/lib/stores.ts
@@ -9,6 +9,9 @@ export const session = writable<{
 // Raw sheet data after import
 export const rawSheetData = writable<string[][]>([]);
 
+// Filtered sheet data after row selection
+export const filteredSheetData = writable<any[]>([]);
+
 // Column mapping configuration
 export const columnMapping = writable<{
   name?: number;
@@ -16,6 +19,7 @@ export const columnMapping = writable<{
   nationality?: number;
   birthday?: number;
   pictureUrl?: number;
+  alreadyPrinted?: number;
 }>({});
 
 // Processed row data after mapping and validation