I recently received a letter from the IRS saying they needed additional information to process my taxes. They need it in 20 days and I somehow lost the letter and I don't remember what the instructions said. What's the quickest way to get another copy?
So far, I've called their helpline at 1-800-829-1040 and waited an hour and also unusuccessfully tried navigating the IRS website (looking for some sort of online account access). Is there an faster/easier way to do this?