You are only required to submit the most recent tax year's return. If you want the others for your records and quick access in the future, then contact the IRS or the person who prepared them and get a courtesy copy.
Most recent year is all that is required although we routinely submit the most recent three.
Samuel Ouya Maina, Esq. 415.391.6612 email@example.com Law Offices of S. Ouya Maina, PC 332 Pine Street, Suite 707 San Francisco, CA 94104
You are required to submit the last filed tax return, along with other documents. The affidavit of support form requests information about the your last 3 years of return. If you do not have the tax return, you can call IRS and reqeust a tax transcript. The phone number for the IRS is 1-800-829-1040.