Yes, you can change the terms of an invoice created in QuickBooks Online, Ronny.
In QuickBooks Online, the primary admin, company admin, accountant, and authorized users can change the terms of an invoice. Here are the steps you can follow:
- Head to the Sales menu, then Invoices.
- Locate your preferred invoice and click the Action dropdown.
- Select View/Edit, then change the invoice terms and other details.
- Once done, hit the Save button.

These modifications will only apply to the specific invoice you are editing.
Additionally, you can create a new one if your preferred terms are not listed. Please refer to the attached screenshot for a visual guide.

If you want to enhance how you manage your customers' transactions, consider engaging with our QuickBooks Live Expert Assisted team. They can provide valuable tips on handling customer interactions and streamlining the invoicing process.
After making the necessary changes, consider sending your customer a statement so they can receive comprehensive details of their associated invoices, payments, and outstanding balances.
With the above steps, you can successfully change the invoice terms. This thread will remain open, so if you have any other concerns, please let us know.