I got a checklist from my advisor.

Sevis-I20, Letter from student, I-539 application, I-90 Fee payment receipt, Verified copy of I-94 (front and back), Copy of passport, Copy of visa, Evidence of validity of the H-1 status, proof of financial support, acceptance letter from University.

I am not sure whether you have to submit the paystubs or not. He asked me to write a letter from the employer stating that I am working with them and I am in status. I do have paystubs too. But, I don't know I need it or not.