Hi new to QuickBooks is it possible to work on the year ending 31/03/21

Hi I am changing over from paper to QuickBooks and trying to learn lots 😫, just been working backwards from today,but I need to complete details for the year ending 31/03/21 , I’ve gone back through payments out of the bank account til 01/04/21 , but then it says there is nothing else to categorise,is it possible to go back further on QuickBooks,if so how please?