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Use form CA5403 to request a copy of your National Insurance number by post.
What you need to do if you've submitted a declaration using the Customs Declaration Service and need to send supporting documents or respond to HMRC queries.
Use these rates and thresholds when you operate your payroll or provide expenses and benefits to your employees.
What to do now that tax credits have ended: what your 'annual review' letter is, checking your details
Find out how tax on dividend income and interest from savings is worked out by HMRC.
If you already have the right or have probate (as an executor or administrator) you can start dealing with the estate. You may need to apply for the right to deal with the estate of the person who's died (also called …
Guidance for sole traders, landlords, and agents to sign up early to use HMRC's new way to report self-employment and property income and expenses for the tax year 2025 to 2026. 
Use the payrolling benefits and expenses online service to show you’re collecting tax on benefits and expenses through your payroll.
Use this tool to find out what the numbers and letters in your tax code mean and how much tax you will pay.
How to claim back tax that HMRC owes you on a small pension lump sum that you've received in the current tax year (P53).
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