First, can someone verify that the number on the letter I received from the IRS is a legit number. [phone number removed]. The IRS website does not refer to the 833 area code in the list for notices.
If this is a legit number for an IRS notice CP12T in reference to a miscalculation of taxable income. If the error is what I think it is, I think it is a TurboTax software issue. Do I contact the IRS or TurboTax first?
IF, the IRS has a legitimate calculation, and they have corrected the error, how do I proceed as I will then need to amend state returns?