Reviews and appeals for direct taxes: Appealing against a decision: Time limits for making an appeal
Appeals sent to HMRC
For direct tax appeals the time limit for sending an appeal to HMRC is 30 days from the date the formal decision notice, such as the notice of assessment, amendment, closure notice or determination, is issued to the customer. This is the date HMRC posts the decision notice, not the date of receipt.
HMRC may agree to accept a late notice of appeal and must do so if satisfied there is a reasonable excuse for not meeting the time limit and a request was made without unreasonable delay after the excuse ended
Notifying appeals to the tribunal
For guidance on notifying appeals to the tribunal, see ARTG2410.