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SA100

Form

The self assessment form required to file the tax return, if it has been filed by post. It’s on HMRC’s website, it can be downloaded, printed, completed and posted. In this case, it needs to be done by 31st October.

Usually if you’ve done one the previous year, HMRC will post you one.

If you do your tax return online, the SA100 form doesn’t need to be printed or posted. Therefore, you get an extended deadline till 31st January.

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