And if someone else who has no money and desperately needs (not just selfishly wants) the tax credit would be shoved out of line if I get one, shouldn't I wait? I would. Or what if I take the car and not apply for a credit? How does all that work, oh you knowledgeable armchair tax lawyers?
Since it's not a tax rebate (like California's), but a tax credit, it's based on the manufactured vehicles. If you forego (or if someone doesn't qualify), it doesn't matter. 200k vehicles delivered in the US is where the cutoff begins (with the quarter end nonsense and ramp-down). California's rebate is part of a fixed pool, so electing not to receive that allows someone else to claim it.
I have written down some very loose notes on how I'd like to see the follow-up federal incentive written. The current incentive is poorly structured for many reasons.