The confirm button will appear when all of the appropriate information has been inputted. Once the 'confirm' button is pressed, the transaction should appear shaded in light green with an 'edit' button alongside as per the information below:
A: Enter Customer/Supplier, the relevant Category and VAT information if you are VAT registered
B: Click 'Confirm' when all information has been inputted
C. 'Confirmed' transactions will appear shaded in light green with an 'Edit' button to make any changes: