I can not respond knowledgably on this as I did not register the car, they did. I am going to assume it all went to CT. If only part of it did, shame on CT legislature for not allowing sales in CT. Hopefully that will change this spring. Whether it is a state tax credit, rebate, incentive is immaterial. I assumed it was as prior to purchase information from multiple sources said CT had an EV purchase 'benefit' / subsidy / credit / rebate whatever. Given federal was a credit it was reasonable to assume CT had a similar plan. It looks like CHEAPR is a Power company plan not governmental. I won't actually know if CT government has an EV incentive, for certain, until I file taxes end of month. Unless, of course, somebody definitively knows, as opposed to presumes.
Michigan gets zero sales tax on Michigander's Tesla purchases in Ohio and Illinois.