2025›Instructions for Form 990-T›Specific Instructions
Additional Codes
2025 Inst 990-T (PDF) · 2026-10-03 edition · updated 2026-10-04 · United States
Additional codes listed below that begin with “9” are not part of the NAICS and are not listed on the NAICS website Census.gov/NAICS/ . The non-NAICS business activity
codes are for use on Form 990-T to identify various types of investments, including certain partnership and S corporation interests, reported as separate trades or businesses under
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