you and the s-corp are separate tax entities. Since the S-corp is not the owner it can not take section 179 nor any depreciation on the vehicle. you own the truck but you are not the business there fore you can not depreciate the truck. you could submit a bill to the S-corp in 2023 to reimburse you for the usage of the vehicle for the business mileage use based on the standard mileage rate. the S-corp would not get a deduction until the year paid. you must have written records to support the mileage for reimbursement.
you could always retitle the vehicle to the S-corp then depreciation (but not 179) could be taken.
Property is valued at the lesser of its adjusted basis or its fair market value when it’s donated or converted.
there are downsides to this. if it Is a corporation (rather than an LLC electing S-Corp status) the transfer would likely be treated as paid-in capital. some states impose franchise taxes based on the total of stock +paid-in capital
if you transfer the truck you must keep contemporaneous mileage records for the use of the truck. failure and the IRS could deny any deduction related to it. if the vehicle is used for personal purposes, the IRS requires you compute the value of personal use. (there are exceptions for certain vehicles see the link) and add iyt to your W-2. then the S-corp gets the full deduction
https://www.patriotsoftware.com/blog/payroll/personal-use-company-vehicle-car-tax-pucc/
