UPSC has opened the Detailed Application Form submission for Civil Services Preliminary Examination 2026 qualifiers. Candidates must complete this crucial step by June 28, 2026, to be eligible for the Main Examination. This process allows for detail confirmation, fee payment, and cadre preference selection. Successful DAF submission is mandatory for receiving Main Examination e-Admit Cards, with the Mains scheduled to commence on August 21, 2026.