回複：我是加拿大公民同時I１４０已得到批準，現持公司H１B。現在我想換一家公司，可行嗎？因為我聽說今年的H１B都已經用完了。謝謝

Yes, you can, but you can not use the approved I-140 to file I-485 in the future unless your current employer agree to hire you back after you get the green card. You can do H-1 transfer and do not need a new H-1 quote.