For you and your spouse (if you’re filing together).
Examples: Driver’s license, passport, green card
Social security numbers or ITINs for each family member
Originals, photocopies, or photos of each family member’s card or letter
Income this year
Whatever you have of the below (most people don't have income from all of these)
Jobs: W2 form, 1099-NEC form
Unemployment benefits: 1099-G form
Social security payments: 1099-SSA form
Bank interest, Dividend or Retirement Accounts - 1099-INT, 1099-DIV or 1099-R forms.
Proof of health insurance