Today the administration is expected to roll out a portion of the infrastructure recommendations; the balance of it will be made public sometime around April 15th to the 20th.
Look for a $10,000 tax credit on EV's made by American union workers at 50% of the car's build. This was hinted late yesterday. I have no other details but it seems to me to be a way to exclude Tesla as pay back for the 2020 election.
Regardless of what's in the plan, just remember this is a starting point and we probably won't know how any of this affects Tesla cost to us until the Fall. When the Congress estimates September for the final passed bill we can assume they mean December.
Buying a new Tesla is always about timing. Ordering now seems to be a good time for most of the refresh Model Y's however there are hints now that the chip shortage is costing Model Y and 3 production numbers. Unless this changes, the wait time will get longer. Currently there are quite a few inventory Model Y's but they are either rejects or odd package configurations. If you aren't particular on configuration, picking up an inventory car or Demo may be a way to avoid the wait time.
I ordered a Y last week and now I wait for the Vin #. My configuration only had two in stock on the west coast and those were sold the next day. I also felt that as the shortage continues, Tesla may increase the price of the Y as they already did on the 3.