I would like to thank everyone for their contributions. I had already told my daughter not to worry and that I would help facilitate the US side of everything. To be perfectly honest, she is a little in the clouds and not really focused on the US logistics.
I wanted to let everyone know that I e-mailed the Vice Principal of our public online school asking for and she responded that the online school administration had changed their minds and decided to go ahead and let my daughter enroll for classes!! She told me that she wanted to help my daughter. YAY!!! 
My daughter is going to start Civics next week and finish before the end of the term. She will then take 3 or 4 core classes starting at the end of January and finish them before she leaves. This is such a huge relief because the online school is in the same district and all the credits will count towards graduation. Even better, they aren’t going to charge us a dime. Now my daughter can finish up precalc, american lit, and/or chemistry and French III and get her civics credit out of the way. This leaves her in a much better position as far as meeting graduation requirements.
@proudterrier - Your experience with the school system sounds awful. I am glad that you had your mom in your corner!! 
Thanks for the advice about getting everything that is agreed to in writing. I am going to pop up to the school tomorrow to talk about the logistics of my daughter returning at the beginning of February 2018 with the school counselors. After speaking with the counselor, I am going to send an e-mail that lays out everything that we spoke about so that I have it in writing.