After setting a Sept. 30 deadline to file for a catchup payment for qualified child dependents who were left off your initial stimulus check, the IRS has decided to give you more time. You’ll now have until Nov. 21 to make a claim if you want to receive that money before the end of 2020.

This isn’t extra cash. It represents a sum you may already be entitled to for kids you claim on your taxes. If you aren’t sure if you got enough money with your stimulus check, use CNET’s stimulus check calculator for an estimate, and make sure you have your AGI handy. If you’re curious about the rhyme and reason, here’s how the IRS decides payment amounts.

https://www.cnet.com/personal-finance/how-does-the-irs-decide-how-much-stimulus-money-you-get-using-this-formula/#ftag=CAD-00-10aag7d