If a client has made a payment for an invoice with another method such as a check, or through another app like Square, you can record this payment manually on the invoice.
Step 1: Go To Your Invoice
From the Documents page, click on the Invoices tab to go to your Invoices page.
Find the invoice you want to record a refund for, then click on its invoice number in the No. column.
Step 2: Go to Record Payment
Once your invoice appears, click on the Record Payment button, located in the top-right corner under your business avatar, or in the Payments box under the Invoice Details.
An Add/Edit Payment box will appear.
Step 3: Add The Payment Details
From the Add/Edit Payment box, you must include some payment details: the payment amount, the payment date, and the payment method used.
To notify your client of the payment being recorded, click the Send Email Confirmation checkbox.
Click on the Save Payment button once you’re done adding your payment details.
When you view your invoice again, the details of your payment should appear in the payments box in the lower right corner.