Go to “Invoices” under “Accounting”.
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You may set up some filters to help you find the invoice.
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Double click on the invoice.
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Click “APPROVE” to approve this invoice. (You may not see this key if the invoice has been approved already.)
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Click “REGISTER PAYMENT” and fill in the payment details based on the customer’s payment info. And click “Yes” to save.
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Then this invoice is done register.
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