Candidates are required to apply online by using the website upsconline.nic.in. It is essential for the applicant to register imself/herself first at One Time Registration (OTR) platform, available on the Commission’s website, and then proceeds for filling up the online application for the examination. OTR has to be registered only once in life time. This can be done anytime throughout the year. If the candidate is already registered, he/she can proceed straightway for filling up the online application for the examination