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Pa estimated underpayment penalty

Rev 1630-2026

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The document provides instructions for Pennsylvania taxpayers on how to calculate and report underpayment of estimated tax for individuals. It outlines the steps to determine if enough estimated tax was paid, details exceptions to interest penalties, and includes worksheets for calculating underpayments and interest due. The form is particularly relevant for the 2020 tax year, with adjustments made due to the COVID-19 pandemic affecting payment deadlines and interest rates.

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Click ‘Get Form’ to open rev 1630 in the editor.
Begin by entering your name as shown on PA-40 and your Social Security Number at the top of the form.
In Section I, calculate your underpayment. Start with Line 1a, where you will input your 2020 tax liability from Form PA-40.
On Line 1b, multiply the amount from Line 1a by 0.90 to determine the required payment threshold.
Proceed to Line 2 and add amounts from Lines 13, 17, 21, 22, and 23 of Form PA-40. This will help assess if you owe a penalty.
Continue filling out Lines 3 through 10 based on your calculations. If any line indicates an underpayment, follow through with Section II for exceptions.
Once completed, review all entries for accuracy before saving or printing the form directly from our platform.

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