All form families

Every form number in the IRS listing, retrieved September 2026, grouped into one page per base number. 856 families in total. A form number is listed here if the listing carries a Form record for it; the Instruction record for the same number sits on the same page.

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Source: IRS listing, retrieved September 2026. This index page lists records from that listing; each form, publication and notice page names its own record ids.

Full listing: IRS, ‘Forms, instructions and publications’.