well, there's other changes too...but the biggest issue is that for you, only $1400 is refundable. You only get to use the full 2000 if you have enough income to actually use up the full 2000 to pay taxes owed. And if any child reaches age 17 (or over) during 2018, then that 2000 doesn't exist for that child...drops to $500, but I haven't checked to see if it's "refundable".
https://ttlc.intuit.com/questions/4482394-how-will-tax-reform-affect-my-2018-federal-tax-return
____________*Answers are correct to the best of my knowledge when posted, but should not be considered to be legal or official tax advice.*
