Short answer. Amending 2022-2024 for the research credit runs in a fixed order: confirm with your CPA which years are still open, assemble the per-year Section 41 documentation a refund claim requires, then have your CPA file the amended returns and elections before the earlier of July 6, 2026 or each year's refund statute of limitations. The documentation is the piece to prepare now.
Key facts
| Step 1 | Confirm eligibility and which of 2022-2024 are still open (small-business retroactive route; refund statute of limitations) |
|---|---|
| Step 2 | Assemble per-year Section 41 documentation: business components, four-part-test rationale, QRE workpaper |
| Step 3 | Your CPA files the amended returns and elections; we never prepare or file |
| Outer deadline | Earlier of July 6, 2026 or each year's refund statute of limitations (Rev. Proc. 2025-28) |
The sequence, start to finish
Three steps, in order. The first and last belong to your CPA; the documentation in the middle is the work.
Start by confirming which years are still open. Under Rev. Proc. 2025-28 the retroactive Section 174A election and the amended returns are due by the earlier of July 6, 2026 or each year's refund statute of limitations, which typically runs three years from the original filing. For many calendar-year filers 2022 is already closed and the live years are 2023 and 2024. Your CPA reads the dates against your actual filings first, because there is no reason to document a year that can no longer be claimed.
Next, assemble the documentation for each open year. A refund claim that adds or changes research positions must identify the business components and the research activities behind the numbers before the IRS will process it, a rule in force since January 10, 2022. This is where the real work sits, and it is the part R&D Binder does: per-year business components, four-part-test rationale, and a QRE workpaper built from your 2022-2024 commit history and payroll register.
Finally, your CPA prepares and files. They make the Section 174A election, add the Section 280C(c)(2) election where the research credit rides along, attach the documentation, and file the amended returns before the outer date. R&D Binder does not prepare Form 6765, make elections, or file. The binder is what your CPA attaches and relies on.
What the documentation has to prove
An amended claim draws more scrutiny than the original return ever did.
A refund claim invites a closer look than an original filing. The IRS refund-claim rule requires the claim to name each business component, identify the research activities, and tie the qualified costs to them before it is processed. For 2022-2024 work being documented in 2026, the weakest answer is a narrative written from memory; the strongest is evidence created at the time.
A team that works in version control already holds that contemporaneous evidence. Commits, pull requests, and review threads from the claim years are timestamped, attributed to named engineers, and specific about what was attempted and what failed, which is the experimentation record the four-part test asks for under Treas. Reg. 1.41-4. R&D Binder clusters that history into per-year business components, scores each against the four-part test, and pairs it with the payroll register for the wage side.
Where R&D Binder stops
Documentation is the whole job, and the whole limit.
R&D Binder produces per-year Section 41 documentation: business components, four-part-test rationale, evidence citations, and a QRE workpaper. It does not compute your final credit, prepare or sign Form 6765, make the elections, file the amended returns, or represent you before the IRS. Those belong to your CPA, and the documentation is built to hand to them.
Two limits worth stating plainly. Commit history documents software research, so wages still come from payroll and contractor costs from invoices, and research outside version control such as lab work or hardware prototyping has to be evidenced elsewhere. And if a year closes before you file, the catch-up route remains: the unamortized balance can be deducted starting with the 2025 return, and the same per-year documentation supports a 2025 credit claim.
Keep going
The rest of the amended-return cluster, and where the binder fits:
Sources
Every claim on this page traces to a primary authority. Each source below is independent and verifiable.
- Rev. Proc. 2025-28 (procedural guidance for OBBBA Section 174A elections and amended returns) - Internal Revenue Service
- 26 U.S.C. § 174A (domestic research and experimental expenditures) - Cornell Law School, Legal Information Institute
- Treas. Reg. § 1.41-4 (recordkeeping and substantiation of qualified research) - Cornell Law School, Legal Information Institute
- 26 U.S.C. § 41 (credit for increasing research activities) - Cornell Law School, Legal Information Institute
- IRS, Instructions for Form 6765 - Internal Revenue Service
- BDO, IRS Issues Procedural Guidance on OBBBA Treatment of R&E Expenditures - BDO
- Cherry Bekaert, Rev. Proc. 2025-28: New Guidance on Section 174A - Cherry Bekaert
Get documentation built to survive an exam
The CPA's part waits on the documentation. R&D Binder builds it per year from evidence your team already created, so the only thing left is the return itself.