You cannot remove the attached PDF when the default setting is enabled because QuickBooks is working exactly as it should, Armmel-Kane.
When you have the default setting turned on to always attach the PDF, the system follows that rule every time. However, we can remove the invoice attachment for a specific customer by manually unchecking the PDF attached checkbox in the Account and Settings. This option is available while you are sending the invoice, so you only need to do it once for that particular customer.
To turn off that PDF attachment, here's how:
- Click on the Gear icon and choose Account and Settings.
- Head to the Sales section and select Online Delivery, then click the Pencil icon.
- Uncheck the box for attaching the PDF.
- When finished, click Save and Done.

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