Good morning, @Pi)522140-procha.
Congrats on making your first post here in the Community. I can share some insight into importing invoices to QuickBooks Online.
I can see how beneficial this would be for you and your business. However, at this time, the field, "Message on Invoice" listed in an invoice, isn't a column that's available when importing invoices. Learn more about what details you can import on an invoice in QuickBooks Online through this guide:
Import multiple invoices at once
Although this is the case, you can send feedback to our Product Developers so they can consider adding this in the near future. Look over our Blog site to keep up with what's new in the system.
I hope this helps answer your question. I'm only a post away if you need me again. Have a great rest of your week!
