For getting a seat in IIT, you have to sit for JEE advanced after 12th. You become eligible for JEE advanced if you qualify JEE main.
What you score in 10th is not important.
Hope you understand now.
All the best for future.

Hey Prajesh,

For admission in IITs or doing job in IT sector your 10th marks will not effect

You have to secure +75% in 12th for JEE

Some companies compare you by your marks

good luck!