Minnesota Form M15C (Additional Charge for Underpayment of ... 2026

1. Click ‘Get Form’ to open it in the editor.
2. Begin by entering the name of your corporation and the FEIN in the designated fields at the top of the form.
3. For Line 1, input your 2019 tax amount from Form M4, ensuring to round to the nearest whole dollar. If this amount is less than $500, you do not need to complete this form.
4. Proceed to Line 2 and enter your 2018 tax amount from your previous year's Form M4.
5. In Line 3, enter the lesser of Line 1 or Line 2 as your required annual payment.
6. Fill in the due dates for each quarter in Line 4, followed by required installments in Line 5 based on your calculated amounts.
7. Continue filling out Lines 6 through 13 according to instructions provided, ensuring accuracy with payments made each period.
8. Finally, calculate any additional charges on Lines 14 through 17 and ensure all calculations are correct before submission.

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