Hello there, @Paul404. I'm here to help share some information about the pre-populated expense transactions in QuickBooks.
It looks like your auto-fill feature is turned on in your settings. Auto-recall uses the information from the last saved transaction of that type for that specific customer, vendor, or employee while entering expenses, bills, etc.
To turn off this feature, follow the steps below:
Go to the Gear icon.
Select Account and Settings.
Click the Advanced tab.
Select the pencil icon in the Automation section.
Uncheck the box beside Pre-fill forms with previously entered content.