HI, I have my H1b approved initially for one year, which is going to expire in this September. So i have applied for my extension in premium process and got approved for 3 years. Now I am planning to go to Canada for stamping in this July. Can I use my extension petition to get the stamping for 3 years, or I can only use my current petition which is valid until only September? As per my research I can use extended petition but i wanted to confirm before going to Canada with you guys if anybody