Sauravcn,

Selling an alcoholic beverage to a minor is a Class A Misdemeanor in most of the states, (I am not sure what state you are from), and if you are convicted of it, it could be a ground for denial of reentry (and it also proves that you were working without working permits and another ground for denial). Just because you have not received any citation or arrest warning does not mean that there isn't one. So check your local police station or ABC and see if there are any pending citation/arrest warning against you. If you do not feel comfortable with this, have your employer check for this. You really need need to know this even if you are not going back home for the winter. You need to take care of this if you are planning to apply for H1/Green card /citizenship etc.

BTW, knockknock, there is a hell of a difference between selling cigarettes to a minor and selling alcohol to a minor, just so you know.