My apologies. Let me try this again.
From IRS; Sales Tax Deduction Calculator:
Also include any state and local general sales taxes paid for a leased motor vehicle.
If you are a cash basis taxpayer (as most of us are), you can only take the amount of tax paid in 2017 on your 2017 return. So you could take off only the July - Dec payment that you made in 2017.
Thanks for the clarification.
