It depends on your actual Start Date. The date your vehicle is placed in service would be your Start Date for your business. Your Start Date would be the date you were "able" to receive revenue, whether or not you actually received any. The date the LLC was formed doesn't matter in relation to when your business started for tax purposes. This assumes you are filing a Schedule C.
Therefore, based on your Start Date, all deductible expenses prior to that would be Start Up Costs.
"Business start-up and
organizational costs are generally capital expenditures. However, you can elect
to deduct up to $5,000 of business start-up and $5,000 of organizational costs
paid or incurred after October 22, 2004. The $5,000 deduction is reduced by the
amount your total start-up or organizational costs exceed $50,000. Any
remaining costs must be amortized.”
Start-up costs include any
amounts paid or incurred in connection with creating an active trade or
business or investigating the creation or acquisition of an active trade or
business.
Organizational costs include
the costs of creating a corporation. "
Note: You
can elect to deduct or amortize certain business start-up costs. Refer to
chapters 7 and 8 of Publication
535, Business Expenses.
How to get there in TurboTax:
While inside the software and
working on your return, type start-up
expenses in the Search at the
top of the screen (you may see a magnifying glass there). There will be a
popup that says Jump to start-up
expenses. Select that to get to the general area.