Under the Certificate of Tax Deposits scheme HMRC will accept Deposits from people liable to United Kingdom taxes and other liabilities that are listed in the Schedule. The Treasury issues receipts for these Deposits under Section 12, National Loans Act 1968. These are called Certificates of Tax Deposit.
HMRC pay these Deposits into the National Loans Fund. Both:
will be held as a charge on the National Loans Fund, supported by the Consolidated Fund of the United Kingdom.
You can use your Certificate of Tax Deposit to pay any tax liability you may have, provided it is listed in the Schedule that is current on the day you purchase the Certificate.