Article: 50439

Overview 

If you did not pay enough estimated taxes throughout the year, or your withholding was not sufficient or timely, Oklahoma may assess a penalty for underpayment. To calculate or request a waiver of this penalty, complete Form 2210 – Underpayment of Estimated Tax and submit it with your Form 511 or 511NR. 

Who Needs to File Form 2210? 

You must complete Form 2210 if: 

• Your total tax due (after credits and withholding) is $500 or more, and 

• You did not make timely estimated payments that covered at least: 

• 90% of your current year’s tax, or 

• 100% of last year’s tax (110% for higher incomes) 

Form 2210 is also used to request a penalty waiver due to circumstances such as disasters, retirement, or casualty losses.  

How to Report 

1. Navigate to the State Taxes section on the left-hand side of the screen. 

2. Click the link: “I’d like to see the forms I’ve filled out or search for a form.” 

3. In the dropdown menu, select Oklahoma. 

4. Click on the Other tab. 

5. Open screen 2210 – Underpayment of Estimated Taxes. 

6. Enter all applicable information. Note: Green-highlighted fields are override entries, meaning they will overwrite values pulled from federal forms or linked schedules. Only use these when necessary. 

7. Click ‘Save‘ once complete. 

Additional Resources 

For further guidance, see:  

• OK Form 511 Instruction Packet (2024) 

• OK Form 511NR Instruction Packet (2024)