Hello student dates are not released by the authorities so I'm unable to provide you the exact dates however events shall schedule as mentioned below -

Registration start for admission MBA 2021-last week of February

Last date of registration - 3rd week of March

Correction window - last week of March

Admit card - 2nd week of April

OPENMAT XLVIII- last week of April

For more details refer to the link mentioned below - https://www.google.com/amp/s/bschool.careers360.com/articles/ignou-mba-admissions/amp

Feel free to comment if you've any doubt

Good luck