Skip to contentSkip to search

HMRC compliance check (UK tax)

A compliance check is an HMRC examination of a taxpayer’s return or tax position. HMRC may enquire into a Self Assessment return within the applicable statutory time limits; the deadline depends on when the return was filed or amended. If the check identifies an error, HMRC may amend or assess tax, subject to the relevant procedure.

Worked example

A taxpayer files a Self Assessment return on time. HMRC gives notice within the applicable enquiry window and checks a deduction before concluding whether an amendment is needed.

Common mistake

Assuming HMRC can open a return enquiry at any time without regard to the statutory window, or that every check proves wrongdoing.

Where it appears in your exams

QualificationExamRelationshipPeriod
ACCA TX (UK) Direct June 2026–June 2027