No, the distribution should not be showing as taxable on your return. First, check line 5(b) on your Form 1040 and make sure the pension distribution reported on box 5(a) is showing in 5(b). If not, then your pension distribution is not showing as taxable, even though it will show on your tax return. If the distribution is showing as taxable, check to see if it is listed in box 2(a) on your Form 1099-R. The form would be incorrect if that was the case.