how and when can i make withdrawals from my 457 b account 
one advantage of a 457 b is that you can take early withdrawals without paying a tax penalty for any unforeseeable emergency this isn t a good idea since you re plundering your retirement savings but unforeseeable emergencies do happen and you ll owe income tax for that year on the amount you withdraw 8the required minimum distribution rmd you must take is determined by an irs worksheet an rmd is a minimum amount that must be withdrawn from certain retirement plans like a 457 b each year once you reach a certain age 18 if you were born between 1951 and 1959 the age is 73 if you were born in 1960 or after the age is 75 this is an increase from the previous age of 72 1920