A 2021 amended tax return can only be printed and mailed using TurboTax, it cannot be e-filed.
Where are you seeing a $15,000 limit for EIC as Single with no dependents in the TurboTax program?
Looking at the TurboTax 2021 Earned Income Credit Worksheet for Line 27 on Form 1040, the worksheet specifically shows the amount of $21,430 as the maximum AGI when Single and no dependents.
