The Internal Revenue Service, IRS, will mail checks worth up to $1,400 to taxpayers who did not claim their stimulus checks during the COVID-19 pandemic. Around one million U.S. taxpayers who were eligible for the check can expect a lump sum mailed to them during tax season.

A total of about $2.4 billion will be sent out automatically to taxpayers who did not claim the recovery rebate credit on their 2021 tax returns. The maximum payment to any one individual will be $1,400, though payments will vary “depending on several factors,” the IRS said.

The Internal Revenue Service is sending unclaimed stimulus checks of up to $1,400 to 1 million US taxpayers in the coming weeks. Here’s why the payments are going out — and how to find out if you’re eligible for the credit: