No you can not apply for NEET PG 2021 EXAM,As NBE had released NEET PG 2021 form on February 23,2021 and deadline to submit the form was march 15,2021, Previously the examination was going to held in January 2021,but it was postponed to April and then to august.According to the new official announcement,the NEET PG 2021 will going to be held on September 11,2021.But you can not appear for this as registration has been closed already.You can apply for NEET PG Exam for 2022 session.The online registration/application process of NEET PG 2022 Exam will start from  4th week of february 2022, and the last date to apply online will be 2nd to 3rd week of march 2022.Correction window will be also opened in 3rd week of march 2022 for making changes in the application form.The tentatively date for NEET PG 2022 Exam is 3rd week of April 2022.