Did the voice on the other end of the line sound like Lois Lerner? Scam.
again, it was not a phone call. it was a letter.
the letter was allegedly from an austin office which is a different state from me. i have never received anything before from an austin office. an earlier response gave a link to a scam which uses regular US mail with an alleged austin return address. The letter looks real but the scam description indicates that they can now send real-looking letters.