I cant find the payment setup in the settings. i want to link the payment with invoice.

Welcome to the Community, @ground_plus-outl. Let me share with you some ideas about linking payment to an invoice in QuickBooks Online (QBO).

Linking your payment to an invoice makes it more convenient for your customers. This allows them to pay online and save more time for their business.

As of this time, online payment is currently unavailable in your region. What we can do is to utilize a third-party online payment application to allow you to do this on your invoice.

You can check out the QuickBooks Apps Store for a third-party app to use.

Then, you can check out this link to manually record invoice payments in QuickBooks Online.

For future reference, you can refer to this article to categorise and match online bank transactions in QuickBooks Online.

Leave a comment below if you need further assistance with managing your invoice. Have a great day!

@ground_plus-outl 

Where is your company located? You may need a 3rd party payment gateway to do so.