Your tax code is a series of laws and regulations that outline the rights and responsibilities of taxpayers as they relate to taxation. In the United States, the federal tax code is called the Internal Revenue Code (IRC), which is established by the U.S. Congress and enforced by the Internal Revenue Service (IRS) in accordance with Treasury Department regulations
. Your employer or pension provider uses your tax code to work out how much Income Tax to take from your pay or pension
. If you need to find your tax code, you can check it online, on the HMRC app, on your payslip, or on a 'Tax Code Notice' letter from HMRC
