Can I add my car registration fees to deductibles if my car is registered in a state different then the state I live in

[ThomasM125]

You can, it doesn't matter what state they belong to. They may not be deductible if you don't itemize your deductions though.

[Opus 17]

"Registration fees' are not deductible.  What is deductible is personal property taxes, which is a tax you pay based on the value of your property.  In some states, a portion of the registration fee may be a value-based tax, and you can include that as one of your deductible state and local taxes.  But probably not the entire registration fee, and not in all states.