Right. You need the VIN and date (usually registration date, which is usually same day they delivered it to you).
If it’s in June, you still get $3750 when you fill out the form next April (doing it in TurboTax or equivalent is much simpler, make, model, VIN, battery size).
See the form’s instructions above, the only change is the modification in max rebate from Jan-Jun 2019 for Tesla.