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Form 990-T (MFT 34 - With Org. Code 3) Estimated Tax Installment and Return Due Dates

Internal Revenue Manual Part 3. Submission Processing · 2026-10-03 edition · updated 2026-10-04 · United States

Form 990-T , Exempt Organization Business Income Tax Return, with Organizational Code 3, due the 15th day of the 4th month after the tax period. This form is for exempt organizations. Extensions are not allowed. See the table below for payment dates and return due dates.

Tax Period Ending

1st Payment

2nd Payment

3rd Payment

4th Payment

Return Due Date

Jan. 31

5/15

7/15

10/15

1/15

5/15

Feb. 28 (29)

6/15

8/15

11/15

2/15

6/15

Mar. 31

7/15

9/15

12/15

3/15

7/15

Apr. 30

8/15

10/15

1/15

4/15

8/15

May 31

9/15

11/15

2/15

5/15

9/15

June 30

10/15

12/15

3/15

6/15

10/15

July 31

11/15

1/15

4/15

7/15

11/15

August 31

12/15

2/15

5/15

8/15

12/15

Sept. 30

1/15

3/15

6/15

9/15

1/15

Oct. 31

2/15

4/15

7/15

10/15

2/15

Nov. 30

3/15

5/15

8/15

11/15

3/15

Dec. 31

4/15

6/15

9/15

12/15

4/15

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▸Contents — Internal Revenue Manual Part 3. Submission Processing

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