If you were required to submit a Self Assessment tax return for a particular tax year to HMRC but you did not do so, HMRC may eventually send you a letter which sets out a ‘determination’ of the tax they think you owe for that tax year. If you failed to file more than one tax return you may get ...

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 ...

Registering for Self Assessment refers to the process by which you tell HMRC that you need to send a Self Assessment tax return, if you do not already do so. Once you have registered, HMRC issue you with a unique taxpayer reference (UTR), and send you a formal notice to file a tax return for a ...

To avoid being charged a late filing penalty, make sure you understand when your Self Assessment tax return should be filed.

You must keep records to support the information you report to HMRC on your Self Assessment tax return or through Making Tax Digital for income tax. Here we look at what you need to keep, and for how long.