Electric Tax Vehicle Credit - Dates

I apologize for posting this twice but I can not find my original post. 

I placed a non-refundable deposit on a Prius Prime in June 2022.  The vehicle finally arrived in October 2022 and I took possession of it. 

What do I use for the Date Acquired? 

June when I made the Deposit?  Using June gives me a $4,502 credit. 

October?  Which only gives me a $2,251 credit. 

Turbo Tax is telling me to change the Placed in Service date to August 15, 2022 since my scenario is grandfathered to the tax change in August. 

Thanks for any help