I'm delighted to answer your queries regarding receiving loan payments, Shan.
If you have enabled the option for customers to pay online using the QuickBooks (QB) Payments feature, accepting payments through a third party is not an option. The only available accepted payment methods for invoices are as follows:
- Credit Card
- Debit Card
- Apple Pay
- PayPal
- ACH bank payment
Whenever you need to accept third-party loan payments, you may look for an invoice management application that supports this functionality. Then, integrate it into QuickBooks to maximize your business experience in the program.
Meanwhile, I recommend contacting the Credit Karma support team if you have more questions regarding their services. This way, you'll have accurate guidance with the said program.
I'm also adding this article that answers frequently asked topics for QB Payments deposits in QuickBooks: Common questions about QuickBooks Payments deposits in QuickBooks Online.
Please don't hesitate to tag me on this thread if you have follow-up questions about loan payments or other types of transactions in QuickBooks. I'll make sure to get back and help you accordingly.