Welcome to the Community. I'm here to help you fix the problem with the invoices in QuickBooks.
The payment options may be disabled from the settings. I recommend checking the customization for each invoice before sending it to your customers.
Here's how:
Sign in to your QuickBooks account.
On the left navigation bar, click Invoices.
Open the invoice.
Click the Customize or Customise option in the upper-right.
Press Payments.
Make sure to enable the available options.
Hit Email.
If the settings are correct, please proceed with contacting our QuickBooks Support Team. I'd suggest using the Get a callback or Start a chat feature from the Help menu.
This way, they can securely access your account and resolve your issues timely. In case you'll need the steps, here's how: