On the Home tab, select the down arrow next to Insert and choose Insert Sheet.
Tip: You can also add a worksheet by selecting the plus sign (+) to the right of the last sheet tab.
On the Home tab, select Insert and select Insert Sheet.
If you don't see Insert, select Cells.
For more info, see Create a workbook in Excel for the web.
Tip: You can also add a worksheet by selecting the plus sign (+) to the right of the last sheet tab.