My H1b Approval was for 3 years, but I received visa stamp only for 2 years, which is going to expire on May 28, 2020. According to I-94, my admit is valid until May 28, 2021. So I am allowed to stay for 1 more year. My company will not file H1B again, they say I already have approval for one more year. Please tell me the procedure for extending my visa stamp. Do I need to visit India before the visa expires? Thanks in advance