The Oxford Communique attorney disagrees with you the bill signed Dec 2015 gives you 24 to 36 months to amend your 2015 filing so paid sales tax can be deducted in that tax year. The IRS has a site to calculate the additional refund and ours shows $1,900.00. My question is still can we hire Turbo Tax to prepare the amended return. Some research is needed here by your company. I prefer to stay with you as a client so I am asking to continue to hire your firm.

That has nothing to do with the EIC and ACTC provisions of the PATH Act. The Sales tax deduction has been in effect for many years, and has always been included in the TT program.
<a rel="nofollow" target="_blank" href="http://www.snopes.com/consumer-rebate-program/">http://www.snopes.com/consumer-rebate-program/</a>

Also see:
<a rel="nofollow" target="_blank" href="https://www.irs.gov/credits-deductions/individuals/deducting-sales-tax?_ga=1.36586784.1822665324.147...>

"continue to hire your firm."  TT is not a CPA firm. It is a computer program. A $1900 refund would be very large for just adding a sales tax itermized deduction.

As SweetieJean said above, the sales tax deduction was in TurboTax last year. (Her earlier answer was about the current delay in EITC/ACTC refunds, imposed by the same PATH Act that made the sales tax deduction permanent.) You *can* use TurboTax to amend your 2015 return if necessary, but more than likely *IF* you qualify you already claimed it. (And given all the caveats for the sales tax deduction, I seriously doubt most people would get a $1,900 refund.)