Nonqualified Pension Plan

I have an amount in Form W-2 Box 11, a distribution from a non-qualified pension plan. The amount in W-2 Box 1 is lower by the amount of my employer's deduction for my health care plan, i.e., a "pre-tax deduction." Because the amount in Box 11 is now reported on Schedule 1 Box 8t, Turbo Tax creates a NEGATIVE AMOUNT in Form 1040 Line 1a. Will this cause a rejection of my Form 1040 submission? If so, how do I avoid this while following instructions for Schedule 1?