Hi there, @Gangle. I'm glad to help you categorize your vendor return in QuickBooks Online (QBO).
If you want to categorize the transaction on your banking page, you can choose any income account since we're unable to suggest any specific account for you. I also recommend you reach out to your Accountant so we can ensure that you categorize the transactions accurately and avoid data messing up with your accounts. They know what's best for your business. If you’re not affiliated with one, you can check our ProAdvisor page so we can help you find one from there.
Furthermore, if you want to record the vendor refund to your QuickBooks account, you can make a bank deposit to record it since you don't have the Vendor credit option.
See this article for details on managing bank deposits: Record and make bank deposits in QuickBooks Online.
You can also check these articles for future reference:
You can always get back if you have other concerns managing your transactions in QBO. I'm always here to assist you. Have a good one!
