Vehicle registration fees must be based on the market value of the vehicle, and not on some other measure, in order for them to be tax-deductible. This is not true in Kansas, so a Kansas registration fee is not deductible, either in whole or in part.
However, a separate vehicle property tax fee can be deductible, if based on market value, so to the extent that this is true in Kansas (and Kansas does in fact charge such a tax), then the personal property taxes portion of your annual vehicle ownership costs are tax-deductible.
For more information on how to mechanically enter a personal property tax into TurboTax, please see the following links:
https://ttlc.intuit.com/questions/1899688-can-i-deduct-an-excise-tax
https://ttlc.intuit.com/questions/3101102-where-do-i-enter-my-ma-excise-taxes
While the second link (above) was written with respect to the state of Massachusetts, the data entry process itself would be identical for Kansas.
Thank you for asking this question.
