Visit the official UPSC website: https://upsc.gov.in
Open the “Examinations” section
Click on the relevant UPSC exam notification for 2023
Read the official notification carefully
Check eligibility criteria, age limit, and educational qualifications
Register on the UPSC Online Application Portal
Fill in the required personal, academic, and contact details
Upload the required documents, photograph, and signature
Select the exam center and other required options
Pay the application fee online, if applicable
Review all details before submission
Submit the application form
Download and save the submitted application confirmation page
Print a copy of the application form for future reference