Account

Your query is not clear. If your company is charging convenience fee, then it has to be income to your company.

Thank you so Much

Yes. You can do it. 

Better to do a TRP (Tax Return Preparer) course first, after that u can start ur own profession as TRP, u'll get notifications directly from the CBDT, if there is any amendment in tax & laws, they will also provide u business in case of any person seeking to get his income tax return filed.