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Publication 1187›Part B›Data Communications›INTENTIONALLY LEFT BLANK

Sec. 5 Test Files

0925 Publ 1187 (PDF) · 2026-10-03 edition · updated 2026-10-04 · United States

Filers are not required to submit a test file; however, the submission of a test file is encouraged for all new electronic filers to test hardware and software. See Part B. Sec. 2, Connecting to FIRE System.

The IRS will check the file to ensure it meets IRS specifications. Current filers may send a test file to ensure the software reflects all required programming changes; however, not all validity, consistency, or math error tests will be conducted.

The test file must consist of a sample of each type of record:

  • Transmitter “T” Record

  • Withholding Agent “W” Record

  • Multiple Recipient “Q” Records (at least 11 recommended)

  • Reconciliation “C” Record

  • End of Transmission “F” Record

Caution: Actual live data must never be sent through the FIRE Test System.

Refer to Part C. Record Format Specifications and Record Layouts.

Provide a valid email address on the “Verify Your Filing Information” screen and you’ll be notified of your file acceptance by email within five calendar days of submission. When using email filtering software, configure software to accept email from fire@irs.gov and irs.e-helpmail@irs.gov. Turn off any email auto replies to these email addresses.

It is the transmitter’s responsibility to check the results of the submission. See Part B. Sec. 2, Connecting to FIRE System, Checking the Status of Your File.

Note: During peak filing periods, the time frame for returning file results may be more than five calendar days.

The following results will be displayed:

“Good” - The test file is good for all files that are not testing for the Combined Federal/State Filing (CF/SF)

Program. “Bad” - The test file contains errors. Click on the filename for a list of the errors. “Not Yet Processed” - The file has been received, but results are not available. Check back in a few days.

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