In the left pane, under Change View, click
View invoice list by, and then click
Unpaid & partially paid.
Click an invoice.
In the left pane, under Common tasks, click
Receive payment for invoice.
Follow the instructions on the screen to allocate payment to
Money automatically designates the invoice as paid or partially
paid, based on the amount of the payment. It also allocates payment
based on the items (labor or product, reimbursable expense, and so
on) and sales tax on the invoice.