"The other tax sites say each parent can now get both checks for children".
Yep, it's a giant loop hole. But it only works if one of the parents has already been sent the $500 and/or 2nd $600 per child.
Then the 2nd parent claims that child, as a dependent, on his 2020 tax return and gets another $1100 for the kid. Be sure that the 1st parent doesn't claim that child, as a dependent, on her 2020 return.
That is, you are not entitled to it. You don't both get it automatically or get to apply for it. You have to finagle the system.
