Hello Rohan,

JEE Main and JEE Advanced are the national level exams and are conducted for admission to Engineering courses in IITs.  Candidates can appear for JEE Main exam after Class 12th.
And, UPSC Civil Services exam can be taken after Bachelor's degree in any discipline.

Both are different exams and for UPSC you don't need to clear JEE exams.
Good Luck!

Hello Rohan,

No, you don't need JEE Main or Advance scores to be eligible for UPSC IAS exam. In fact, both JEE Main and Advance are engineering entrance exams. If you want to know the eligibility criteria of UPSC then, Check Here

All the Best!