National tax form for international applicant

Hi ! D24 is applying as international student. She has filled the CSS and uploaded parental tax forms to I-doc, but the college board keeps emailing “Our records show that the College Board has not received your required information”. The document which is required by institution is 2022 national tax form. And there is a button for those who do not expect to submit a federal tax return for this year.
“National tax form” - does it mean the US tax form? If it does, I guess, she should press that button, even if we submitted our national tax form (from native country)