If Developer tab in Microsoft Office is missing, you can add Developer tab in Word, Excel, etc. via Settings, Group Policy, Registry Editor.

How to filter for duplicate records in Excel Perhaps the easiest way to find duplicates is to use Excel’s advanced filter. It’s flexible and can easily find duplicate rows.

Excel provides built-in tools to help you to find discrepancies like Filters, Conditional Formatting, advanced functions (If and IS, VLookUp, etc.), and Add-ins.