if you paid more than 1/2 the cost of keeping up a home for yourself and your child who lived with you for more than 6 months of the year you can file as head of household. your spouse's info is not needed.
"your child" means your child, stepchild, or foster child who you can claim as a dependent.
so the child if not a full-time student must be under 19 at the end of the tax year or if a full-time student must be under 24 at the end of the tax year. The child hasn't provided over ½ their own support. The child didn't file a joint return unless there was no tax liability but merely filing jointly to facilitate the refund of taxes withheld or estimates paid
if you qualify for HOH then you can e-file without your spouse's info.
if you don't qualify as HOH, then without thee spouse's info you can not e-file. you'll have to file by mail and include the explanation you gave.
