I am stuck on a window asking for charitable donations again. What do I put? I am confused. I've already entered my amount and it wouldn't take it.

If you are taking the standard deduction, you can also deduct up to $300 in charitable donations (made in cash, check or charge only) due to a 1-time provision in the CARES act.

However, you can't also list charity donations in the main Deductions section.  The special $300 donation comes later in the program.  If you are taking the standard deduction, you need to delete all your charitable contributions from the Deductions and Credits page, and only enter the special $300 deduction when it comes up later in the Review section.  If you are itemizing your deductions, you should list your itemized charity donations but you should not list anything for a special COVID donation deduction when it comes up in the Review section.