Get your taxes done using TurboTax

The penalty will be calculated in TurboTax based on the amount and date of payment that you enter in the section on estimated taxes that you paid. 

The late payment penalty is 0.5% of the tax owed after the due date, for each month or part of a month the tax remains unpaid, up to 25%. You won't have to pay the penalty if you can show reasonable cause for the failure to pay on time. 

• We calculate the penalty separately for each required installment. The number of days late is first determined and then multiplied by the effective interest rate for the installment period.

• See Publication 505 PDF, Tax Withholding and Estimated Tax for more information.