The marriage allowance has been available since 6 April 2015. Some couples are only just becoming aware of the marriage allowance. The good news is that claims can be backdated for up to four years.

Self Assessment payments usually become due on 31 January each year. Sometimes payments are also due on 31 July too. Here we explain which Self Assessment tax payments are due on each of these days. 

If, after you have filed your tax return, you become aware that an entry is incorrect, you can amend that return if you are in time to do so. Also, if you have used provisional figures when you completed a tax return, you will need to amend your tax return when the actual information becomes ...

If you no longer need to file Self Assessment tax returns, you should tell HMRC.

This page looks at what to do if you have paid too much tax on your employment or pension income.

A key part of Self Assessment is calculating your tax (and, if appropriate, self-employed National Insurance contributions and student loan repayments) due for the tax year. In most cases, HMRC perform this calculation for you based on the information you include on your tax return.