All nonresident aliens present in the U.S. under F-1, F-2, J-1, or J-2 nonimmigrant status must file Form 8843 "Statement for Exempt Individuals and Individuals With a Medical Condition"—even if they received NO income during 2021. Form 8843 must be filed if an individual is:
- present in the U.S. during 2021
- a nonresident alien
- present in the U.S. under F-1, F-2, J-1, or J-2 status
If an individual meets all three qualifications above, the individual must file Form 8843, regardless of the individual's age and even if the individual is not required to file a U.S. income tax return (Form 1040NR or Form 1040NR-EZ). Make sure to complete the top portion of the form and also Part 1 and Part 3. Do not forget to sign the form on the 2nd page and mail the form to the IRS. Mailing address is in the instructions portion on the form.
Get the form and instructions here: https://www.irs.gov/pub/irs-pdf/f8843.pdf
Form 8843 is not an income tax return. Form 8843 is merely an informational statement required by the U.S. government for certain nonresident aliens (including the spouses or dependents of nonresident aliens). Nonresident aliens who are not required to file an income tax return (Form 1040NR or Form 1040NR-EZ), but who are required to file Form 8843, need not apply for a Social Security number (SSN) or an Individual Taxpayer Identification Number (ITIN). If, however, an SSN/ITIN has been assigned, the number must be included on Form 8843.
For general information regarding taxes: https://www.irs.gov/individuals/international-taxpayers/foreign-students-and-scholars