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Find and use tools and calculators that will help you work out your tax.
Find recognised commercial software suppliers and software you can use to file your Company Tax Return and any supplementary pages online.
Use form SA1 to register for Self Assessment for any reason other than self-employment.
How to work out your adjusted net income and the circumstances when it can affect your tax liability.
If you account for your import VAT on your VAT Return, you’ll have to access the Customs Declaration Service to get a postponed import VAT statement online.
Use form CA5403 to request a copy of your National Insurance number by post.
Use these rates and thresholds when you operate your payroll or provide expenses and benefits to your employees.
How to set up a new Council Tax account on a property you have recently moved into.
Use this tool to find out what the numbers and letters in your tax code mean and how much tax you will pay.
Find out what software you will need to report self-employment and property income to HMRC.
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).
Use the PAYE tax calculator to work out how much Income Tax an employee needs to pay, in a pay period that is in the current tax year.
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.
Claim Income Tax relief on your job expenses by post using form P87.
Check if you need to use Making Tax Digital for Income Tax to report your self-employment and property income.
Apply for an agent services account (ASA) to register with HMRC as a tax adviser and use certain HMRC services.
Find out if and when you need to register a trust on the Trust Registration Service.
Use this list to check if you can claim a fixed amount of tax relief (also known as 'flat rate expenses') for your work expenses if you're an employee.
How to check if you’ve paid the right amount of tax, if your pay is not what you expected.
Use the online service or postal form CF411 to apply for National Insurance Home Responsibilities Protection, or to transfer it from a spouse or partner.
Do not include personal or financial information like your National Insurance number or credit card details.
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