Hey.

The score required to get admission in any IIITS would depend on the branch you're taking admission in.  But generally, you would require a score more than 125 atleast for lower IIITs and a score above 155 atleast for Top IIITs. You can use the link below to check out the cut offs for various different IIITs and different branches.

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

Best of luck!