I mistakenly selected annualization of income in the calculation of underpayment penalties. How do I change this selection?

[ToddL · Accepted solution]

You will have to delete Form 2210: Underpayment of Estimated Tax, along with any associated worksheets (there shouldn't be any, but look for them in the list).

See: How do I delete forms in TurboTax Online?

After deleting this Form, log out of the program. When you log back in, use the Delete a Form tool (List of Forms in My Return) to confirm it has been removed from your return. You can ten re-enter the interview for underpayment penalties.