i read in guides that indian tax code are in built into the program but i am not seeing any inbuilt tax code can someone tell me how to enable inbuilt tax codes
The localization scheme is undergoing change right now. See https://www.manager.io/guides/22137 for a description of the new process. Right now, the only countries included are those where report transformations exist. There are no report transformations for India, so there are no Indian tax codes to import. But you do not need them.
For now, what you must do is create your own custom tax codes. Some of these may need to be multi-component codes. See https://www.manager.io/guides/8901.