Try using the "Delete a Form" tool to
remove the Form 2210: Underpayment of Tax and 2210AI: Annualized Income (also any
associated worksheets).
See: How do I delete forms in TurboTax Online?
After
deleting these forms and worksheets, log out of the program. When you
log back in, use the Delete a Form tool (List of Forms in My Return) to confirm
they have been removed from your return.
