Many businesses did qualifying work in earlier years and never claimed the credit. The usual fix is an amended return. It is a real option, and for some companies it is the largest part of a first study, but a refund claim for the credit has to carry specific information or the IRS can reject it.

Which years can you still claim?

Open tax years can generally be amended. In most cases that means the last three years from the date the original return was filed. Pass-through businesses add a layer, because the credit flows to the owners and their returns are affected too. Your CPA confirms which years are still open for your business and your owners.

What the IRS requires in an amended claim

The IRS has published a list of what a valid research credit claim for refund must include. Based on its IRS guidance on research credit amended claims, a claim should:

• Identify each business component the claim relates to, meaning the product, process, software, technique or formula you were developing or improving

• Describe the research activities performed for each business component

• Report total qualified wage, supply and contract research expenses for the year, which can be done on Form 6765

The IRS originally also required the names of the individuals who did the work and the information each person was trying to discover. For claims postmarked on or after June 18, 2024, it waived those two items. It has said it may still ask for them if the claim is examined, so we collect them anyway.

What happens if a claim is incomplete

The IRS has set up a transition period in which it gives a taxpayer 45 days to fix a deficient claim before making a final decision. Its guidance says the transition period runs through January 10, 2027. After that, a claim that is missing required items may simply be rejected, so it pays to file a complete claim the first time.

Why an amended claim is more work than a current-year claim

For the current year, records are fresh and people remember what they worked on. For earlier years, staff may have left, projects may be finished, and time was never tracked. A good study rebuilds the picture from what still exists: project lists, tickets, drawings, test records, payroll and interviews with the people who are still around.

What to gather before you start

• A list of the products, processes and software you built or improved in each open year

• Who worked on them, with roles and rough time spent

• Test results, design files, notes or tickets that show the work

• Payroll totals for those people

• Costs of supplies used in testing and any outside contractors, with the contracts

Where amended claims go wrong

• Claiming broad categories of spending with no project-level detail

• Counting work that was routine, or that a customer funded and owned

• Allocating time to projects with nothing to support the percentage

• Missing one of the required items, so the claim is returned

• Forgetting that owners of a pass-through business may need their own returns amended

How the form fits in

The credit is figured on Form 6765 and attached to the return. Your CPA files the amended returns, and the study gives the CPA the calculation, the project narratives and the supporting records needed to complete the form and answer questions later.

Should you amend?

It depends on whether the work meets the four-part test. If it does, an amended claim can be worth pursuing. If it does not, the time is better spent elsewhere. A free 5 to 10 minute screening shows whether prior years look worth a closer look, and we work with your CPA from there. You can also read how a study works from start to finish.