To apply for IPU CET 2020, candidates must follow a 4-step process: 1) Register by filling personal details from March 1-31, 2020; 2) Fill the application form with personal, academic, and qualification details; 3) Upload documents like photo and signature; 4) Pay the application fee of INR 1200 through online payment. Important dates include the exam from April 25-May 5, 2020 and result announcement from May-July 2020.