Do you have cap limited?
If not, you don't need to use premium process. You can work at any time after INC receive your application (you need to get the receipt). But if you tranfer from University or Institute to Company, it is another story.
If not, you don't need to use premium process. You can work at any time after INC receive your application (you need to get the receipt). But if you tranfer from University or Institute to Company, it is another story.