When working with Excel, you may need to unprotect your worksheet to edit a worksheet. If you have the password please follow steps below:
Step 1: Click anywhere in the worksheet you want to unprotect;
Step 2: Click the "Home" tab from the ribbon;
Step 3: Click "Format" in the Cells section, and select "Unprotect Sheet" from the list;
Step 3: In the "Unprotect Sheet" window, type in the password and click "OK" at the bottom;
Alternatively, right-click on the worksheet name, select "Unprotect Sheet" from the list.
You can also bring up "Unprotect Sheet" window by clicking the Review Tab in the Ribbon.
Step 1: Click the Review Tab from the ribbon;
Step 2: Click Unprotect Sheet in the Protect section.