Steps to follow for Additional Endorsement in License :-
1. Visit https://sarathi.parivahan.gov.in/
2. Proceed for License related services
3. Select concerned state
4. Click on "Services on Drivers License( Renewal/Duplicate/Additional Endorsement of Driving Licence/Others)" from "Driving License" menu
5. Click "continue"
6. Enter "Drivers License number" and "Date of birth" click "Get Drivers License Details"
7. Fill up Application Form
8. Take appointment
9. Visit RTO on scheduled date, with original documents"