Yes, when you sponsor someone, you must submit Form I-864 (Affidavit of Support) and prove your income.

You'll be required to provide your most recent federal tax return (IRS Form 1040 or tax transcript).

If you're self-employed, you'll need to provide business records and tax returns showing your income.

In some cases, a joint sponsor with enough income can also file a separate I-864 to help support the immigrant.