Thanks for posting in the Community space, @BooksB4Breakfast.
You can go to the Account and settings and make sure to turn on the Custom transaction numbers option. This way, QuickBooks will not assign or automatically numbers your invoices when you process the import.
Here's how:
- Go to the Gear ⚙ and select Account and Settings.
- Click the Sales tab. Then select Edit ✎ in the Sales form content section.
- Tap Custom transaction numbers and turn on the option.
- Hit Save and then Done.
Once done, you can now upload your spreadsheets and map your import fields correctly. For detailed steps, see this article: Import multiple invoices at once.
You can also bookmark the articles below for future reference. It contains a video for visual reference and steps on how to enhance and add a brand to your sales forms.
Let me know by leaving a reply below if you need further assistance in importing your invoice in QuickBooks. I'm always here to help. Take care always.
