The Transcash service, which allows customers to pay HMRC at the Post Office, is being withdrawn from December 2017.
As a result of the change, HMRC is encouraging its customers to pay using an alternative method, such as Direct Debt, online or telephone banking – including Faster Payments, Bacs and CHAPS – or by debit card online or by telephone.
The change also applies if you pay Class 1A National Insurance contributions at the Post Office or if you are a pension scheme administrator who pays charges arising from the Accounting for Tax Return at the Post Office.
HMRC’s guidance Paying HMRC provides both general and specific information about paying HMRC.