You need to be atleast 21 as on July 1st, 2020. Which means that you should have been born after 02.07.1990 and not after 01.07.2000. If your birthday falls in between these 2 dates, you are eligible for SBI PO. Or else, unfortunately you are not eligible and you may have to wait until next year. There is upper age relaxation for Reserved Categories but the  lower age limit remains the same. For more information, please visit the official website at: https://ibps-recruitment.in/sbi-po/