If the children lived with you for more than six months or you provided over half of their support for the year, and/or your ex-wife, "who is the custodial parent", signs a form 8332 or similar statement that she will not claim the children on her tax return, then you can claim them.
That's what my Tax preparation book says, may be more to it, you can call or go online to the IRS website at www.irs.gov to ask questions.
That's what my Tax preparation book says, may be more to it, you can call or go online to the IRS website at www.irs.gov to ask questions.