Limited companies
The monthly file has to survive an accountant at year end. That means a director loan that has been posted as it happened, VAT that ties, inter-account transfers removed from turnover, and dividends recorded only when you confirm they were declared.
We do not prepare statutory accounts, a corporation tax computation, or a confirmation statement. We hand over a trial balance that agrees to the bank. If there are two companies and costs are paid by the wrong one, those costs are recharged or moved on your instruction, and the pair of entries is shown. We do not net the companies off into one set of books.