State tax issue

I live in Kentucky and worked remotely in Ky. However my work was in Virginia. I am doing a nonresidential state tax form for Va. I am confused on how to get past the issues it’s saying I have. It wants me to leave two places on the Virginia state tax form blank. However, when I do this it won’t allow me to go farther. I don’t know what to do. Please help. Thx