Money received in sales invoice

I have created sales invoice. Before I have received some payments from customer in advance which I want to show matched against my sales invoice.

Is there any way I can add money received to the invoice without adding bank account?

How has the customer paid you then?! Cash? Create a cash account…

Also, you said customer has previously paid you money in advance, how did you record this transaction?

See some guides:

How do I record customer prepayment?

How do I match customer advance payment with sales invoice?