Follow these steps to view how the underpayment of estimated tax is calculated:
- Go to the Check Return tab.
- Select Forms from the left menu.
- Select 2210 from the list (if it's not showing, select All then enter 2210 in the search field).
- Scroll to the final page of the form to view the Underpayment Penalty Worksheet.
This worksheet shows how the penalty is calculated based on your input in ProConnect Tax, including withholding on income and estimated payments entered in Payments, Penalties & Extensions > 20XX Estimated Payments.