1st Step: Go to the member's profile.

In the search bar, search for the customer > Select the student's profile by clicking on it.

2nd Step: Get the invoice PDF.

You can get the PDF of the invoice by either clicking on the clip or clicking in the invoice and clicking on the "Download Invoice (PDF)" button.

You can also get invoices' PDF files by going to Transactions > Invoices, and clicking on the clip: