Yes, if you are not reimbursed for your travel expenses (including a rental car) to a temporary job site, then you can deduct those job-related expenses. Note, though, that in order to deduct job-related expenses, you must itemize expenses on your tax return (instead of taking the standard deduction) and job-related expenses are subject to the 2% of AGI floor (meaning you can only deduct the amount of your job-related expenses that exceed 2% of your adjusted gross income.)
Here is more information regarding the deductibility of job-related expenses, plus steps to take to enter the job-related expenses on Form 2106 in TurboTax.
https://ttlc.intuit.com/replies/3300622
https://ttlc.intuit.com/replies/3300445
To enter your job-related expenses, take the following steps:
From within your federal return, type "Form 2106" in the FIND field at the top of the screen. Select "Jump To Form 2106" and you will be brought to this section of TurboTax.
