Thank you for your reply. Yes, I took the standard deduction for single filing status in the original return. However, after updating the return with the forgotten Form 1099-R rollover data and answering all the Turbotax s/w questions, the final 1040-X form shows $80 less than the standard deduction taken in Column A, hence resulting in additional refund. I think there should be no additional refund or payment due, since I am only updating with additional non-taxable income.
