Deductions & credits

I paid Health Insurance which was reported as income on my salary from the Subchapter S corporation for which I own 46% of the stock.  My salary box shows $4,981 in box 14 which was the insurance. But I do not see that entry any where in  the 1040.  I was told to go to Schedule 1, line 16 and enter it there.  But I cannot edit that cell.  It must be info being brought in from another form.  What form?