Hello drm53!

Thanks for the update. Yes, QuickBooks offers trial versions. Let me help you.

For QuickBooks Online, you can create a new account with our free 30-day trial. Simply go to https://quickbooks.intuit.com/za/pricing/, choose a plan, and select the Free 30-day trial button. You can use the same email address or a different one.

For QuickBooks Desktop, you can download and install our trial version, too. You can find the link through this article: Download a trial of QuickBooks Desktop. You don't need any code to use the QuickBooks Desktop trial version.

I also added this link: Record invoice payments in QuickBooks Online. This will show you the best way of entering the customer payment.

I'll be here if you need more assistance with any customer-related concerns. Take care!