Are Tally Customisation and Add-ons the same?
Add-ons are a type of Tally ERP 9 customisation. It is a standardised customisation that is commonly used by businesses.
Some businesses have unique requirements that may not have been commonly asked before and thus to fulfill this requirement, a Tally service provider will have to customise your Tally specifically as per the requirement.
Thus to understand whether your requirement is a customisation or a ready-made add-on is available, you will have to contact Antraweb or your trusted service provider.