Mechanical/ Aerospace Engineering Admits/Applicants

[balanbay]

Hi. I applied Virginia Tech Aerospace Engineering Phd program. A few weeks ago they requested me to fill Immigration Information Form (I20), however, the admission decision has not been made on my application yet. So, I asked them  the funding information part, since I do not have any external funding, my financial situation does not allow me to cover tuition and living expenses if I cannot get assistantship offer.  And they said that you have to fill the form with funding information in order to  the department can finalize admission decisions for international applicants.  I am confused, what does all that mean? Am I accepted without funding? Do you have any idea and suggestions.