Hello, miller. 

To seamlessly integrate a payment link with QuickBooks Online, you will need to sign up for a QuickBooks Payments or Merchant Service account. QuickBooks Payments is a built-in payment solution offered by Intuit. The feature can be added to your invoice and sent via email or text. Additionally, you have the option to send the payment link as a QR code, allowing customers to scan and make payments effortlessly using their mobile devices.

If you haven't signed up for QuickBooks Payments yet, you can follow these steps:

1. Go to the Gear icon in the top right corner.
2. Select Account and Settings.
3. In the left-hand menu, choose Payments.
4. Click Activate payments.
5. Enter all the information needed.

Once you sign up for a payment account, your application will be reviewed and subject to eligibility criteria, credit, and application approval.

For more detailed steps on signing up for payments in QBO, refer to this article: Sign up for QuickBooks Payments. Also, check out this article to learn how payment links work: How to use payment links.

Also, QuickBooks Payment or Merchant services are only offered in the US region, efenzer. In the meantime, you may want to utilize a third-party payment processor and connect it to your QuickBooks Online account. Search for one from the Apps menu, then go to Find apps. 

Lastly, these articles may be helpful for gaining more insight into processing payments and staying informed about deposit times. They will provide additional details and ensure you stay updated with the latest information.

• Take and process payments in QuickBooks Online
• Find out when QuickBooks Payments deposits customer payments
• What to do if customers can't pay their invoices online
• QuickBooks Payments FAQ

 Please let me know if there's anything else you need help with regarding processing and accepting customer payments in QBO. I'm always here to help. Have a great day.