@CTHusky72
No, you can’t submit a later form with a negative credit. You submit one single form 5695 for the year in which the property was installed and placed in service, regardless of when you actually paid for it.
Your choice is to submit the form now, using the full price, and then file an amended return later to reduce the credit; or file now using the reduced price, and submit an amended return to claim a larger credit if the utility rebate is never paid; or file an extension on your 2022 tax return and wait until the rebate is acted on one way or the other.
