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IRS Withholding calculator suggests 24 allowances for me &10 for wife. We take 6&5 from paycheck. Turbotax says pay $1,900 to the feds. Is there a Turbotax error?

My wife and are married filing jointly.  Using the IRS calculator we should be receiving a federal refund this year.  We even had child born in 2018.  State taxes calculate a large refund, however, Turbotax estimates we need to pay $1,900 to the federal government.  

Is it an error with Turbotax, or the new tax law just sucks?