government hmrc
HMRC Tax Calculation Error
HMRC has made an error in your tax calculation, sent an incorrect bill, or failed to process a submission correctly.
Suggested Complaint Framing
Title: Dispute — incorrect tax calculation
Description: HMRC has issued an incorrect tax calculation/bill. The error is [describe].
Desired outcome: Correction of tax calculation, removal of penalties caused by HMRC error, and written confirmation.
Priority: high
Relevant UK legislation
- Taxes Management Act 1970
- HMRC Charter
Tips
- Always include your UTR or NI number
- Keep copies of all submissions
- Escalate via Adjudicator then Parliamentary Ombudsman route
Common with these organisations
HMRC
Step-by-step
- Create your case with this template pre-filled.
- Log every interaction and promise from the organisation.
- Send a formal complaint letter and track deadlines.
- Escalate to the relevant ombudsman if unresolved.