After you file

You enter your estimated tax payment in the Deductions and Credits Section, then Estimates and Other Taxes Paid, and then Estimates. Choose the type of estimated tax you made from the drop down list:

When you are done with your tax entries, use the file routine in TurboTax and you will be presented with ways to pay your tax due, either online when you submit your tax return or by mailing in a voucher and payment.