Self assessment is a compulsory yearly government requirement, which can be a headache if you are not absolutely sure how to approach it. All businesses and self employed people including sole traders, partnerships, company directors, charitable organisations and 40% tax payers need to file tax returns and others.
Failure to comply or late returns can result in fines, penalties and other charges. Incorrectly filled out forms can also prove costly and perhaps refusal to claim allowances, extra tax liability or even investigation.