Hello @FG_Kevin,
You can turn on online invoicing to help the system determine the payment options available for your customers when creating invoices. Let me show you how.
- Go to the Gear icon.
- Under YOUR COMPANY, select Accounts and Settings.
- Select Sales.
- On the Online delivery section, select the Pencil icon.
- Below the Additional email options for invoices menu, select Online invoice.
- Select Save.
- Click Done.
On top of that, I've also included this reference which you can share with your customers in case you're having issues with payment processing: What to do if customers can't pay their invoices online.
If you have any other questions, please let me know by leaving any comments below. I'll be here to lend a hand.