Question regarding entering 1099-R from 401(k)

Hi,

 

I made after tax contributions through my payroll which were automatically converted to Roth 401(k) by the plan. I received 1099-R because of this. I have entered this form in TT online but I am confused by the following question that I get after entering this form -

 

"Did you make after-tax contributions to a 401(k), 403(b), or 457(b) plan?"
("This isn’t common but this is money you put in the plan yourself, not from your company.")

 

If I select yes, the box is empty (I would have guessed that it should have been pre-populated with Box 5 amount from 1099-R. If I select No I am concerned that the conversion amount will be treated as taxable. I am not sure how I am supposed to answer this question (and there is no help section for this question). Please clarify what I am supposed to answer for this question. I did not make any contributions other than after tax contributions directly through payroll.