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= refund research (BMFOL only)

Internal Revenue Manual Part 2. Information Technology · 2026-10-03 edition · updated 2026-10-04 · United States

1

07-17

SSN (required): nnn-nn-nnnn

1

18

Display Source Code (required):

V = BMF valid SSN

W = BMF in valid SSN

1

19-20

MFT (required)

1

21-26

Tax Period (required)

1

27-29

Plan Number (required)

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▸Contents — Internal Revenue Manual Part 2. Information Technology
Internal Revenue Manual Part 2. Information Technology

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