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I haven't received the letter yet. I had to call the IRS to find out why there is a delay in my refund. She explained to me what I needed to do and said that I didn't have to wait for the letter in the mail. She also gave me the fax number, however, when I try faxing it just rings and rings. It took me forever to get through to speak to someone, so I thought maybe I could get some help here.