Is it permissible to work temporarily in selling alcoholic beverages to meet a need, provided that the financial compensation for it is disposed of?

As long as the job requires you to sell alcohol, even if only for a few days, it is forbidden to accept it, except in a situation of dire necessity that permits the consumption of forbidden things. This would be if, were you not to work, you would not find what suffices for your essential needs and those whom you support. If you do work in it due to necessity, then donate the equivalent of the unlawful portion of your wages if your necessity is met by what remains.