LTD Company Accounts

Basic one-man band accounts currently putting each month into a spreadsheet (technically I don't need to file until 2019 but want to be ahead for the prev trading year) talking about 30 transactions for the entire year. likely take someone that knows what they are doing around a hour (perhaps more given my poor record keeping)

looking for fixed price to file the return (or tell me how to file it) and this will likely be ongoing each year