Your trusted adviser for R&D Tax Credits, Creative Tax Relief, and R&D Grants

Advance Notification Form Checker

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Check if you need to submit an Advance Notification Form​ (ANF)


If you make your R&D claim on or after 1 April 2027, you do not need to send HMRC a claim notification form. For claims made before that date, use the checker below.

Are you claiming for the first time?

Was the previous claim rejected by HMRC — i.e. was it removed from the Company Tax Return by HMRC?

Did the previous claim cover an accounting period that began BEFORE 1 April 2023?

Was this claim submitted with an amended Corporation Tax return (CT600)? An amended tax return is a CT600 that is resubmitted within 12 months of the original filing date.​

Have you made any other submissions that were not rejected by HMRC within 3 years from the last date of your current claim notification period? These dates are:

You do not need to submit a claim notification form for this claim​.

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The result depends on the information you enter. For the rules and exceptions, read HMRC’s claim notification guidance.

If you make this claim on or after 1 April 2027, you do not need to notify HMRC. If you make it before 1 April 2027, the following notification period applies:

The result depends on the information you enter. For the rules and exceptions, read HMRC’s claim notification guidance.

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