Small companies have to file documents at two places :
1 – Companies house ; and
2 – HMRC
Companies house: two documents
1 – Annual accounts – Companies house does not charge for filing this document.
2 – Annual return – Companies house charges a single annual charge, information can be updated for free throughout the year by filing further confirmation statements during the payment period.
HMRC: two document
1 – Companies Tax return
2 – Owner tax return
Bonus Material
Group Accounts – A company is exempt from the requirement to prepare group accounts if at the end of the financial year, the company is subject to the small companies regime. source Companies Act 2006 Section 399