If you have not filed a federal tax return and you are due a refund, you have up to three years to file and claim your refund.
For 2018 tax returns, you have until April 18, 2022 to file and claim your refund.
Unclaimed income tax refunds totaling almost $1.5 billion may be waiting for an estimated 1.5 million taxpayers who did not file a 2018 Form 1040 federal income tax return, but people must act before the April tax deadline.