Tax returns aren’t complicated for me, but our 3 businesses are all quite simple models. The main business is VAT registered too, but that probably helps, as the VAT return is very simple, but gives you a kick up the arse every 3 months.
If I’m unsure of anything, I look it up on the HMRC website. Got myself £6k back last Jan and everything was black and white – but as others have said, it was only my money already, that I’d overpaid via the CIS. Being VAT registered saves us around a grand a quarter too.
If/when I register my main business as a Ltd Company, then I’ll probably employ an accountant.