I have rectified my gate application(2020) but why is showing the application status is under process after 11 days.
Don't worry about that, During scrutiny process GATE 2020 office would check your GATE application form. If your application is found correct in everything, the status message will soon change to be accepted. If your application is found defective in any way, you will receive an email and an sms with instructions.
I hope this helps.