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Form 8866

IRS title: “Interest Computation Under the Look-Back Method for Property Depreciated Under the Income Forecast Method”.

2 records in this family: 1 Form row, 1 Instruction row, 0 other-language rows. Every link below goes to the IRS’s own PDF for that record.

Form

Form record for this number, exactly as the IRS listing gives them.
Record idProduct numberTitleRevision datePosted dateLanguage / editionIRS copy
Form 8866Form 8866Interest Computation Under the Look-Back Method for Property Depreciated Under the Income Forecast MethodDec 202501/12/2026EnglishOpen the IRS copy

Instructions

Instruction record for this number, verbatim from the listing.
Record idProduct numberTitleRevision datePosted dateLanguage / editionIRS copy
Instruction 8866Instruction 8866Instructions for Form 8866, Interest Computation Under the Look-Back Method for Property Depreciated Under the Income Forecast MethodDec 202501/23/2026EnglishOpen the IRS copy

Source: IRS listing, retrieved September 2026. Record ids: Form 8866, Instruction 8866.

Every revision date, posted date, title and PDF link above is copied from the row with that record id in the listing, unchanged.

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

Where this form number sits

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