TAX AUTHORITY INTEGRATION WITH A POS BUILT IN JAVA

POS system built in JAVA with source and I want to integrate local Tax Authority with it. The end result will be a printed number given by the Tax authority, a QR Code and a logo at the bottom of the receipt. It uses jasperprint (jasperreport) to generate the receipts. Its an Enterprise grade software so in depth knowledge of JAVA is required, documentation for the Tax Authority will be provided.