Here is the best way to get at the facts ... and no one can challenge you that your information came from an anonymous message board
Run this IRS application and it will determine who can take the credit
https://www.irs.gov/help/ita/does-my-childdependent-qualify-for-the-child-tax-credit-or-the-credit-f...I’d suggest running through this app playing both the role of your wife and the role of the ex and see what happens
The app should identify one who can claim and one who can’t
