The bill payment Tender window lets you specify the tender type of the payment and calculates any change due to the customer.
To tender a bill payment:
Open the Bill Payment window.
Click Tender. This displays the Tender window for bill payment.

Enter the amount the customer gives you.
Click the button that corresponds to the tender type the customer is using, such as Cash. This adds the amount and tender type to the list, reduces the Total Tendered amount, reduces the Balance, and displays the Change amount to be returned to the customer.
Click Finalize to accept the bill payment. This displays a confirmation window.
Click Yes to confirm the payment. This closes the Tender window unless the payment is larger than the Total Due. In that case, the Tender Change window displays the amount due to the customer.
After giving the change to the customer, click Done to close the window.