An Adoption Taxpayer Identification Number (ATIN) is A brief nine-digit number issued with the IRS to people who are in the entire process of legally adopting a U.S. citizen or resident baby but who can not get an SSN for that kid in time to file their tax return. Vikki https://andresdhge4.theideasblog.com/33988191/tax-id-number-no-further-a-mystery