Hi ynorma29,
Sales created before the GST registration is referred to as regular invoices/sales receipts.
Here's how to record them in your QuickBooks Online:
- Click on the Plus icon.
- Choose Invoice or Sales Receipt.
- Select a customer, enter the item details, and amount.
- In the Amounts are drop-down, select Out of scope of GST.
- Click on Save and close.
This is an example screenshot:
You can also read more of this rule from the Department of Industry's website: https://www.business.gov.au/finance/payments-and-invoicing/types-of-invoices
Is your GST setup not yet complete? This reference will be a great guide for you: How to setup GST in QuickBooks Online?
Keep us posted if you have questions about GST or anything else. We're here to help.