Caution:
Internal Revenue Manual Part 21. Customer Account Services · 2026-10-03 edition · updated 2026-10-04 · United States
The tax period ending must be researched when working status reports/errors received once IDRS is systemically researched.
When the certification application is for a prior year in which a return was due, the tax period must correspond to the year of certification.
When the tax period requested is a tax period for which a tax return is not yet due, enter the tax year for the tax return currently required to be filed, based on the IRS received date of the Form 8802.
See the charts below for factors that must be considered when determining the due date for Form 1040 and other series tax returns.
Form 1040:
If the year ends in the month
Then form is due in 3.5 months
- January
May 15th
- February
June 15th
- March
July 15th
- April
August 15th
- May
September 15th
- June
October 15th
- July
November 15th
- August
December 15th
- September
January 15th
- October
February 15th
- November
March 15th
- December
April 15th
Other Tax Forms:
If
Then
- Form 1065
See IRM 21.7.4.4.2.3, Form 1065 Return Due Dates and IRM 3.11.15-3, Due Date Chart.
- Form 1120
See IRM 21.7.4.4.4.2, Form 1120 Series Due Dates - Tax Years Beginning Before January 1, 2016, IRM 21.7.4.4.4.2.1, Beginning After December 31, 2015, and IRM 3.11.16-2, Due Date Charts.
- Form 1120-C
See IRM 21.7.4.4.4.2, Form 1120 Series Due Dates - Tax Years Beginning Before January 1, 2016, IRM 21.7.4.4.4.2.1, Beginning After December 31, 2015, and IRM 3.11.16-2, Due Date Charts.
- Form 1120-IC DISC
See IRM 21.7.4.4.4.2, Form 1120 Series Due Dates - Tax Years Beginning Before January 1, 2016, IRM 21.7.4.4.4.2.1, Beginning After December 31, 2015, and IRM 3.11.16-2, Due Date Charts.
- Form 1041
See IRM 21.7.4.4.1, Form 1041, U.S. Income Tax Return for Estates and Trusts and IRM 3.11.14-4, Due Date Chart.
- Form 990, Form 990-EZ, Form 990-PF, Form 990-T (IRC 501(c))
See IRM 21.7.7.6.22.2, Extension Due Dates and IRM 3.12.12.3.3, Due Date of Returns.
- Form 990-T (IRC 401(a) and IRC 408(a))
See IRM 21.7.7.6.22.2, Extension Due Dates and IRM 3.12.12.3.3, Due Date of Returns.
- Form 5227
See IRM 21.7.7.6.9, Split Interest Trust Information Return and IRM 3.12.12.3.3, Due Date of Returns.
- Form 5500
See IRM 21.5.11.5.2, Due Date for Form 5500 Filings.
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