Many people worldwide have to submit UK self-assessment tax returns.

Failing to comply with the rules and making mistakes can result in substantial penalties. However, completing these returns correctly can be complex. For example, you'll need to know and disclose all your taxable income, details of capital gains, and some National Insurance contributions liabilities.

Tax reliefs and allowances are available, such as relief for pension contributions, Gift Aid donations and loan interest. Claiming them is complicated. There are strict time limits for making claims and, if you make a mistake, you could lose valuable tax relief. At Grant Thornton, we're here to help.

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