If you don’t know how to duplicate a sheet in Excel then you must follow these steps:-
1. The first step is to drag to the left or right to select the sheet. 
2. Then locate the Home Tab.
3. Now click on Format, in the cell section.
4. Then go to the Move or Copy Sheet option.
5. Now click on Create a Copy and then on OK.
6. Finally, you will see a copy of your sheet, by clicking on the tab on the left corner of your sheet.
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