We have this working billing/invoicing module (you can get it here: [url removed, login to view]) but we would like to make a duplicate to work with a different account and different settings so we can choose with which account to bill in the order detail page (2 buttons for generating invoice). We need this done for Opencart 2.2.
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Hi, I have experience with opencart core modules customisation and I have developed many installable extensions as well. I can customise based on your request. let's start work together. thanks