Thanks DoninGA. Schedule A Line 18 was checked, but TT would not let me uncheck it. However, it did let me uncheck Info Wks Part VI "Check this box if you are itemizing for state tax or other purposes even though your itemized deductions are less than your standard deduction." As soon as I unchecked it, TT flipped to the standard deduction and let me amend the return. Thanks very much for your help.
