INTM331101 | DT applications and claims: Self Assessment - Repayment claims from non-residents
From HM Revenue & Customs · International Manual
Key points
You can correct a claim without opening an enquiry if the claimant has made an obvious error or mistake in the claim
You have 9 months from the date HM Revenue & Customs receives the claim in which to correct any obvious mistakes or errors in the claim
Claimants have 12 months from the date we receive the claim in which they can amend that claim
No amendment can be made to a claim while it is the subject of an enquiry.