A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
Hi,
A text box lets you add text anywhere in your file. You can add, copy, or delete it in your Microsoft Office applications. Regarding your concern, you should be able to paste a text box to any cells and drag them to an Excel chart. Have you installed the latest Office updates on your computer? There's a possibility that you need to update your Excel app to make this work. To update your Office, you may refer to this link for the steps.
If you still encounter the same issue after you install the latest Office updates on your computer, we suggest that you launch Excel in safe mode. You may refer to this link for the steps.
Let us know if that works for you.