Even VAT is fairly straightforward if you sign up for the VAT Flat Rate Scheme (assuming you're eligible). You'd probably need to pay for something like FreeAge

Even VAT is fairly straightforward if you sign up for the VAT Flat Rate Scheme (assuming you're eligible). You'd probably need to pay for something like FreeAgent to help you with your VAT filings, but amount of money the Flat Rate Scheme would save you would easily pay for the cost of the bookkeeping application.