I understood that we could apply that to the invoice.

My original question was not about how to record an upfront deposit.

I sometimes need to send out invoice, generating payment link, to the customers, so they can prepay for the work with their credit cards from the payment link in the invoice; however, when we do this, we won't be able to track the back order correctly on sales orders, so I was wondering if there's any way we can just link/connect to the existing invoice to sales order to track backorders.

Recording upfront deposit is a solution if I didn't have to send the payment link from an invoice.

Thank you so much in advance!