Thanks for becoming part of the Community, Jessica 820.

If you've already adjusted your Custom transaction numbers setting for invoices and are still seeing an invalid number, I'd recommend getting in touch with JobNimbus directly. Detailed steps for reaching them can be found on the Contact page of their website.

You'll also be able to find many detailed resources about using QuickBooks in our help article archives.

I'll be here to help if there's any questions. Have a great day!