System and method for integrating payment terminal with point-of-sale system

A system (108) for integrating a payment terminal (112) with a point-of-sale (POS) system (106), the system (108) comprising:

• a memory (202);
• and
• at least one processor (204) communicably connected to the memory (202), the at least one processor (204) configured to:
• extract invoice data associated with an invoice from a rendered payment page (302) of the POS system (106), the rendered payment page being executed in a browser application (104), wherein the rendered payment page comprises one or more fields;
• transmit the invoice data to the payment terminal (112) over a Local Area Network (LAN) for facilitating a customer payment;
• retrieve one or more transaction details from the payment terminal (112) in response to an event indicating the customer payment;
• and
• update the one or more fields of the rendered payment page of the POS system (106) with the one or more transaction details through browser-level interaction with the rendered payment page,
• wherein the extraction of the invoice data and the retrieval of the one or more transaction details are performed by a browser plugin configured to interface directly with the rendered payment page.