To register a sole proprietorship in India, follow these steps:

Choose a business name and obtain a PAN card for the proprietor.
Open a current bank account in the name of the business.
Register under the Shop and Establishment Act if applicable.
Obtain GST registration if the business turnover exceeds ₹20 lakh.
Optionally, apply for Udyog Aadhar (now Udyam registration) under MSME for additional benefits like loans and subsidies.