Taxpayers who have provided bank information with the IRS will receive the direct-deposit payments, while others will get paper checks or debit cards mailed to them.
Officials said in the interest of speeding up the relief payments, the IRS will use the latest tax return available, either the 2019 return filed last year or the 2020 return that is due by April 15.
When should I get my payment?
The IRS said Friday that processing of the new round of stimulus checks has already begun.
President Joe Biden signed the new $1.9 trillion rescue package on Thursday, the day after it won final passage in the House. The measure provides for payments to qualifying individuals of up to $1,400, with payments to a qualifying family of four of $5,600.
It is estimated that 85% of Americans will be eligible for the payments and the goal is to have millions of the payments disbursed in the next few weeks.
If a person's job situation changed last year because of the COVID-19 pandemic, officials said that the IRS will adjust the size of the new impact payments after the 2020 return has been filed and provide a supplemental payment if that is called for. Officials said those adjustments will be made automatically by the IRS for people who have already filed their 2020 returns.
Officials said they wanted to handle the payments this way rather than waiting for the 2020 tax return to be filed in the interest of speeding payments to taxpayers.
The IRS said the first and second Economic Impact Payments no longer appear in Get My Payment.
For more information on those payments, view or create an online account with the IRS and check your mail for IRS Notices 1444 and 1444-B.
If you didn't get the full amount of the first or second payment you were eligible for, you may be eligible to claim the 2020 Recovery Rebate Credit and must file a 2020 tax return even if you aren't required to file, officials said.
The Associated Press contributed to this story.