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Find and use tools and calculators that will help you work out your tax.
Get help with Self Assessment by using online tools and guidance, and watching HMRC YouTube videos.
Find out about the changes to Statutory Sick Pay, when they'll be introduced and what to do when a sickness absence starts before and ends on or after 6 April 2026.
Tell HMRC if you've left or intend to leave the UK and find out how to get relief or a repayment on UK Income Tax (P85).
Find recognised commercial software suppliers and software you can use to file your Company Tax Return and any supplementary pages online.
Find out how to appeal an individual or partnership Self Assessment penalty.
Use these rates and thresholds when you operate your payroll or provide expenses and benefits to your employees.
Sign in, manage and use your online account to receive payments from parents.
How to check if you’ve paid the right amount of tax, if your pay is not what you expected.
Check if you need to use Making Tax Digital for Income Tax to report your self-employment and property income.
How to work out your adjusted net income and the circumstances when it can affect your tax liability.
How to set up a new Council Tax account on a property you have recently moved into.
Register your trust online if you’re a trustee.
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.
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).
Find out how to get a certificate of residence as an individual, company or organisation so you do not get taxed twice on foreign income.
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.
Use this calculator to work out employee National Insurance contributions for the current tax year, if you're an employee, employer, or a software developer.
Use form SA1 to register for Self Assessment for any reason other than self-employment.
Use this tool to help you find software that meets your needs for Making Tax Digital for Income Tax.
Do not include personal or financial information like your National Insurance number or credit card details.
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