I accidentally put my daughter as a "son" and I already saved and completed my docs. I can't go back to edit this. Does anyone know what I can do to change this?

If you have not e-filed, you can click on Add a State to get back in to the return and make changes.  You do not really have to add a state return, but that trick will allow you in.  Then you can go to MY INFO to edit the information for your child.