What documents should U.S. residents upload to Documents Exchange in Sprintax?

Signed tax summary provided by Sprintax

Signed tax forms (Form W-4, Form NC-4)

Signed Form W-9, if eligible for and choose to claim treaty benefits

Copies of personal documents

1. Visa

2. Passport

3. I-20 or DS-2019 or Green Card

4. I-94