If you look at troy's delivery tab for the months april 2018/may 2018/june 2018 and count the amount of model 3 us cars (850) and multiply by 14, you will see that already around 12000 cars are scheduled to be delivered in this quarter. What you are suggesting is that tesla , will do no end of quarter 'californian' push, put on all costs of produced cars in this quarter and all revenue for next quarter. If it would be a difference for 100 or 200 million dollar, maybe tesla would do it.. but this sort of difference will run in the billions. I think what tesla will do is produce as many cars as possible in the next quarter, but for the rest the 200000 limit , will be reached in this quarter.
Billions? One billion in model 3s is 20,000 cars in revenue, perhaps 30k cars in materials. The 200k EV criteria is for sold vehicles in US. Tesla can handle a couple week delay to extend the credit.
No reason to not build as many as possible, need to keep the parts inventory flowing.