At UPenn site in Financial Aid Checklist for Prospective Undergraduates for International Students is only one item:
“Submit CSS/PROFILE online to the College Board”
But at the same time in CSS profile for UPenn is notice:
“The colleges and programs listed below require additional information to complete your financial aid application. If you have not already done so, submit a copy of each of the documents listed below directly to the college(s) or program(s) indicated.
Submitting the documents listed below to the College Board through IDOC will not meet the requirement for the schools listed below.
2017 Federal Income Tax Return for parent and student”
I don’t filing taxes, so for my case it will be a Non-Tax Filer Form
And at UPenn site for U.S. Citizens and Permanent Residents is note:
“Note: Don’t file taxes? You still need to submit a Non-Tax Filer Form or your application will remain incomplete.”
So I’m in doubts.