Can I fix form 8889 to exclude employee contibutions? Turbo tax won't allow me to adjust?

My w-2 box 12W reports $8100 as employer contributions to HSA, but the instructions state that employee contributions are to be inclcuded in this number. My portion was $7,100 which I have added to the form 8889 line 2, but Turbo tax won't allow me to adjust the employer portion to their actual $1,000 contribution