It is your responsibility to keep full and accurate business records, this can be by;
• An accounts ledger
• Computer spread sheet
• Basic book keeping software
It is very easy to let accounts get on top of you so ensure you make time every week to keep them up to date. A simple system is all that is needed. It may be worthwhile paying someone an hour or so a month to do this for you.
Driving Instructors more used to dealing with figures may find it fairly simple and cost effective to file their own accounts on-line. This is a simple process and HMRC have some useful information and tutorials on their website. Whatever system you use you must keep all receipts