I believe there is a bug in the Turbotax software for tax year 2018 regarding 529 withdrawals and qualified educational expenses.

I withdrew $70,342 from my 529 Plan for my daughter's qualified educational expenses of the same amount (tuition, books and room and board).  Turbotax is reducing my qualified education expenses by $10,000, calling it an adjustment "used for credit or deduction" resulting in a tax liability.  Not sure what this deduction is, as I have never deducted 529 contributions from my Federal return.  Last year this was not an issue.  I read through the IRS documentation and do not see any reference to this $10,000 adjustment.  The only credit I am eligible for is the "qualified higher education expense for 529 plan".  I believe there is an error in the Turbotax software.  Please help!