Sunita, As per the marks vs rank analysis you have scored around 71-80 marks in Jee mains 2021 (March) and your rank would be somewhere between 82249 - 63079 , considering you as a general category candidate. And with this rank, you have very low chances to secure a seat in any of the IIITs (as per the previous years records). You can get admission in PEC Chandigarh, GNDU,ICFAI university, LPU, some NIts such as Mizoram, Meghalaya, etc. You can check out the cutoffs of IIITs here:

https://engineering.careers360.com/articles/jee-main-cutoff-for-top-iiits

And you can use the college predictor link given below:

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

Thankyou!