Hello, DCWGeoff.
I'll share additional information about submitting product suggestions using the link provided by my colleague JonpriL. You can select the QuickBooks Invoice Online Checkout since you're working with invoices.
I've also included the following article for your reference in case you'll need to void or refund payments for your customers:
I'm only a post away if you need more help in completing your other tasks in QuickBooks. It's always my pleasure to help you out again.
