I got the same letter for my R1S. I'm wondering if I should just put the 7033lb empty weight on my registration and file for the $5,000 credit. No surprise they seem to have no clue what they are doing at the DOR.
The $5000 Colorado state tax credit went into effect July 1st of this year. You don't have to wait for 2024 to take delivery. The extra $2500 starting January 1, 2024 is only for vehicles with an MSRP of $35,000 or less, which no Rivian qualifies for.