I have a follow-on question to this. My son had to file 3 state returns as he had earnings due to internships/Teaching Assistant in 3 different states. He is a resident of Virginia. On his original filing, he is expecting a refund for Federal, VA, PA returns and owes a small amount of tax on his NY state return. When he amended his return to correct the IRA type from Traditional to ROTH, he owes taxes on the Federal and VA state return that will lower the amount of his refund for both Federal and VA state. He will be filing an amended Federal and VA state return. The change of deduction from Traditional IRA to ROTH IRA did not impact his taxes for Pennsylvania and New York. Does he need to file an amended state return for PA and NY state?
Thanks
