Hi there, @events5.
Let me guide you through changing your date format according to your preferences available in QuickBooks Online (QBO). This way, we can meet with business standardization and improved readability.
To start, please follow the steps below:
- Go to the Gear icon and select Account and Settings.

- Navigate to the Advanced tab and scroll to the Other Preferences section.
- Click Edit.
- Choose a Date format from the dropdown.

- Select Save and Done.
Once done, you can create an invoice and record its payments once your client decides to pay their balances.

Should you need further assistance or have questions about managing invoices, @events5, don't hesitate to post them in this thread. I’m always here to help. Have a good one!