W-2 Income in box 12 code z

I have a W-2 from a previous employer with a Only small amount of income reported in box 12 with code z. Turbo tax automatically imported my W-2, but it says it cannot calculate the tax on it. Do I need to manually fill out any values or additional forms here? Has anyone run into this/will I still be able to efile with this?

 

 Thanks!