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Federal Form Instructions

Official IRS instructions for every form 1099Express supports.

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Official IRS instructions for every form 1099Express supports. Links open on IRS.gov in a new tab.

Form Type IRS Instructions About the Form
1099-A Instructions for Forms 1099-A and 1099-C (Rev. April 2025) About Form 1099-A on IRS.gov
1099-B About Form 1099-B, Proceeds from Broker and Barter Exchange Transactions | Internal Revenue Service About Form 1099-B on IRS.gov
1099-C Instructions for Forms 1099-A and 1099-C (Rev. April 2025) About Form 1099-C on IRS.gov
1099-DA 2026 Instructions for Form 1099-DA About Form 1099-DA on IRS.gov
1099-DIV Instructions for Form 1099-DIV (Rev. January 2024) About Form 1099-DIV on IRS.gov
1099-INT Instructions for Forms 1099-INT and 1099-OID (Rev. January 2024) About Form 1099-INT on IRS.gov
1099-K Instructions for Form 1099-K (Rev. December 2026) About Form 1099-K on IRS.gov
1099-NEC Instructions for Forms 1099-MISC and 1099-NEC (Rev. December 2026) About Form 1099-NEC on IRS.gov
1099-MISC Instructions for Forms 1099-MISC and 1099-NEC (Rev. December 2026) About Form 1099-MISC on IRS.gov
1099-R 2026 Instructions for Forms 1099-R and 5498 About Form 1099-R on IRS.gov
1099-S Instructions for Form 1099-S (Rev. December 2026) About Form 1099-S on IRS.gov
1098-C Instructions for Form 1098-C (Rev. November 2019) About Form 1098-C on IRS.gov
1098-MORT Instructions for Form 1098 (Rev. December 2026) About Form 1098 on IRS.gov
1098-VLI Form 1098-VLI (December 2026) About Form 1098 on IRS.gov
W2G Instructions for Forms W-2G and 5754 (Rev. January 2026) About Form W-2G on IRS.gov
3922 Instructions for Forms 3921 and 3922 (Rev. April 2025) About Form 3922 on IRS.gov
5498-IRA 2026 Instructions for Forms 1099-R and 5498 About Form 5498 on IRS.gov
1099-OID Instructions for Forms 1099-INT and 1099-OID (Rev. January 2024) About Form 1099-OID on IRS.gov
W-2 / W-3 / W-2C 2026 General Instructions for Forms W-2 and W-3 About Form W-2 on IRS.gov
1042 (Annual Return) 2025 Instructions for Form 1042 About Form 1042 on IRS.gov
1042-S 2026 Instructions for Form 1042-S About Form 1042-S on IRS.gov
Other Information Return Forms (IRS overview pages)
1099-CAP About Form 1099-CAP on IRS.gov
1099-G About Form 1099-G on IRS.gov
1099-H About Form 1099-H on IRS.gov
1099-LS About Form 1099-LS on IRS.gov
1099-LTC About Form 1099-LTC on IRS.gov
1099-PATR About Form 1099-PATR on IRS.gov
1099-Q About Form 1099-Q on IRS.gov
1099-QA About Form 1099-QA on IRS.gov
1099-SA About Form 1099-SA on IRS.gov
1099-SB About Form 1099-SB on IRS.gov
1097-BTC About Form 1097-BTC on IRS.gov
1098-E About Form 1098-E on IRS.gov
1098-T About Form 1098-T on IRS.gov
3921 About Form 3921 on IRS.gov
5498-SA About Form 5498-SA on IRS.gov
5498-ESA About Form 5498-ESA on IRS.gov

Additional Resources

Resource Link
Publication 1220 (Specifications for Electronic Filing of Forms 1097, 1098, 1099, 3921, 3922, 5498, and W-2G) Publication 1220 (Rev. 5-2026)
Publication 515 2026 Publication 515
IRS Website Internal Revenue Service | An official website of the United States government
SSA Website The United States Social Security Administration
Cornell Law Reasonable Cause 26 CFR § 301.6724-1 - Reasonable cause. | Electronic Code of Federal Regulations (e-CFR) | US Law | LII / Legal Information Institute