If you’re using QuickFile to it’s full extent (e.g. full profit and loss rather than just keeping track of money in and out), then I’d advise you to input your purchases and raise sales invoices too, and assign the payments.
How you raise the salea invoices depends on you and your business. Some businesses, let’s say a butcher, would just want to record what they sell on a daily/weekly basis. Whereas a business consultant will want to invoice each business separately. I’ll find some guides for you shortly to put you on the right track 
Using these features will help you keep a record of your profit and loss too, ready for your tax return
Edit
Here’s a few guides that may help:
- Accounting for daily takings - useful for retail sales etc
- Recording your purchases
- Creating invoices
- Accounting for non-invoiced transactions - such as bank charges