Hello, It looks good Congratulations!

can i make sell it on codecanyon as addon to SMA?

Yes, selling as add-on should be fine. Thank you

OK thank you,, I will modify it accordingly so that it get easily integrated with SMA and addon buyer shall be easily be able to integrate both

tbosmartmart.com/ please rate this website too, its using your backend

Hello, there is one query , What is this PIN which asks to biller for doing certain actions? how to set it, and what is its function, and how to remove it,
logged in as biller

Hello,

Please set it in the POS Settings. This is for the staff user, if they want to delete the order items. If you want to allow them without pin then you can leave the pin input empty and save.

Thank you