My client took her standard deduction ($14,250) on the original return. The amendment had no effect on the standard deduction, but now 1040x line 2, column C reads $14,550, which includes the charitable deduction. To avoid showing a $300 change in column B, I made col A and col C entries equal, resulting in an e-file rejection. File under "damned if you do, damned if you don't."