Hello, @KAVF - Welcome back to the Seller Community!
Great question! At this time, there is not a way to add an invoice to a sale that has already been created. In this case, you need to add everything that is to be charged to one Invoice. You can go into the invoice and add payment if you need to. Hopefully this is what you are looking for.
You can learn more on how to Manage Square Invoices Online here.
Please let us know if you have any other questions or if we did not answer your question.
Have a great day!
Sayra
Community Moderator, Square // Moderadora de la Comunidad, Square
Sign in and click Mark as Best Answer if my reply answers your question.
Inicie seción y haga clic en Marcar como "Mejor Respuesta" si mi respuesta contesta su pregunta.
