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Use form SA800 to file a Partnership Tax Return.
Print your SA302 tax calculation and tax year overview if you're applying for a mortgage and need proof of earnings.
If you complete a Self Assessment tax return, you must use it to tell HMRC about your student or postgraduate loan deductions.
Use form SA1 to register for Self Assessment for any reason other than self-employment.
Use the SA303 form to apply to reduce your Self Assessment payments on account.
Find out how to appeal an individual or partnership Self Assessment penalty. For example, either online or by post using forms SA370 or SA371.
Don’t include personal or financial information like your National Insurance number or credit card details.
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