I am trying to tie to the 2017 depreciation schedule from a CPA but turbo tax is calculating an AMT depreciation adjustment. How do I override the adjustment?

you don't.  if you do an override you will not be able to efile,  the amt adjustment may be correct.  certain assets are depreciated using different lives and methods for AMT purposes.  perhaps you CPA never kept track of AMT depreciation.  AMT depreciation does not reduce regular depreciation for regular tax purposes. it only affects the calculation of alternative minimum tax income and the related tax.  if the AMT tax is greater than the regular tax you pay the higher.  .