/amend-decoder

Decode the amend window.

Enter your install or purchase details below. The decoder applies the controlling primary-source tests — binding-contract acquisition (§30D / §25E), installation-completion (§25D(e)(8)(A)), placed-in-service (§25C(i)), and statute-of-limitations (§6511(a)) — and returns:

· An eligibility verdict (amend-yes / amend-no / edge-case / statute-expired) with the controlling statute pin
· The exact IRS form line to file or amend (Form 5695 / Form 8936)
· The statute-of-limitations amend-by date with .ics calendar export
· State-conformity layer for your state of residence

Decoder runs entirely in your browser. Install dates, contract dates, dollar amounts, and state are never posted to our servers. We don't currently count anything — no analytics beacon is wired. When we add aggregate analytics post-AdSense soak, only the verdict kind (e.g. amend-yes) will be counted — never the dates or amounts you entered.

last verified2026-05-07·source:law.cornell.edulast verified2026-05-07·source:law.cornell.edulast verified2026-05-07·source:law.cornell.edu

Amend window decoder

client-side · no logging

Step 1 · Credit type

Step 2 · Tax year of install / purchase

Step 4 · Filing status for that year

Filed by:

Step 5 · State (for state-conformity layer)

Complete the steps above to see the verdict, applicable statute, and exact IRS form line.

FormFinder

Find the exact line to write on.

Given the credit type, tax year, filing status, and whether you're claiming originally or amending, the FormFinder outputs the primary form (Form 5695 or Form 8936), the specific line, the supporting schedule, and the documentation to retain.

Form finder

Credit type

Tax year

Filing status

Action

Pick a credit type, tax year, and action to see the exact form and line.

last verified2026-05-07·source:law.cornell.edu

Decoder logic is sourced from primary text.

Every verdict pins back to the IRS publication, USC subsection, and §6511 statute-of-limits rule that controls the user's specific case. Hover or focus any footnote chip below to see the primary URL and last-verified date.

^[1] §25D installation-completion rule — controls when a §25D solar / battery / geothermal expenditure is "made".

^[2] §30D / §25E binding-contract acquisition rule (vehicles only).

^[3] §6511 amend-window math — drives the amend-by deadline date and .ics export.

^[4] Form 5695 line refs (residential energy). ^[5] Form 8936 line refs (clean vehicle).

FS-2025-05 Q-numbers verified against the live FAQ page 2026-05-07: Q2 (vehicle "acquired" definition for §25E / §30D / §45W), Q3 (acquisition effect on credit claim after placed-in-service), Q7 (§25D installation-completion / payment-by-12-31 not sufficient). Form 5695 line refs verified against i5695 (2025) Catalog 66412G dated 2026-01-22; Form 8936 line refs verified against i8936 (2025) Catalog 67912V dated 2025-10-14. §25D(g) applicable-percentage schedule (30% for 2022–2025) is re-verification of the verbatim §25D(g) schedule from law.cornell.edu deferred to the next content commit.