Still waiting on your third stimulus check? You might be in luck—but you’ll need to act fast. The IRS is releasing $2.4 billion in Recovery Rebate Credit payments to nearly 1 million Americans who missed out in 2021. If you never received the third Economic Impact Payment, you could still claim up to $1,400 per person—but only if you file or amend your 2021 tax return before April 15, 2025.