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What to do if you need to pay more tax or you're due a refund, including P800 tax calculations from HM Revenue and Customs (HMRC).
Tell HMRC about a change of address for your personal tax affairs, for example PAYE, Income Tax.
Become a sole trader with HM Revenue and Customs - your legal responsibilities if you run a business as a self-employed sole trader.
Enrol and use HMRC's PAYE Online service to send payroll information to HMRC, to view the balance of what you owe, and to access tax codes and notices about your employees
Estimate the Child Benefit you've received and your High Income Child Benefit tax charge
Class 1 National Insurance (NI) contribution rates for the current tax year, what NI category letters mean.
How to tell HMRC if there's a change to your personal details - address, name, income, marital status, gender
When you start repaying your student loan, your monthly repayments, what to do if you have 2 jobs or are self-employed, how to get a refund if you've overpaid.
Log in to HMRC's Stamp Taxes Online service to file your SDLT return as a solicitor, agent or legal conveyancer
File your Company Tax Return with HMRC, and your company accounts with Companies House
How to report and pay Capital Gains Tax (CGT).
Child Trust Fund accounts - find a lost account, how to make payments, managing the account
What you need to do if you start working for yourself.
What you need to do to start a business: choose a legal structure, see if you need licences and insurance, learn about reliefs and benefits
How you're taxed on dividend payments and how your income affects the amount of tax to pay
Sign in to your Help to Save account - check your balance, grow your savings and bonus, read your messages and do other tasks
Marriage Allowance allows you to transfer some of your Personal Allowance to your husband, wife or civil partner: what you get and how to apply for free.
Sign in to the Construction Industry Scheme online service to file your contractor monthly returns or verify a subcontractor.
Tax free saving for your first home and later life: what is a LISA, who can apply, 25% government bonus, withdrawal charges.
Check how much Income Tax you paid to HM Revenue and Customs (HMRC) last year. Check your P800.
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