Millions of Americans could receive a $1,500 IRS refund in 2025, linked to unclaimed Recovery Rebate Credits from 2021. If you did not receive the third stimulus payment, you may be eligible. The IRS urges taxpayers to file their 2021 tax return before April 15, 2025, to claim their refund. Learn how to check your eligibility, file your tax return, and track your refund online.