Why are they taking so long ? Simple answer is congress has cut the IRS budget every year for a decade so now the IRS is severely understaffed so anything requiring a human eyeball is taking longer than ever before.
Complain to your congress person to get this fixed.
Nothing you really can do while they determine the outcome of the situation ... so just wait patiently until they finish their review. Once they make a decision one way or the other you can plan your next move if needed.
