Geothermal Heat Pump Rebate

We installed a geothermal heat pump in September 2022 and applied for a Mass Save rebate in October.  According to Form 5695 instructions, my costs that I include on the form must be reduced by the amount of that rebate.  However, Mass Save has sat on our application for 4 months now and, even though the online status for the rebate shows that the application is "Non-Compliant", whenever I call, the representative tells me that it's not "Non-Compliant" but is actually "In-Process" and I should eventually get it.

 

So, what do I enter for costs, what I paid or what I paid minus the rebate?  If I enter what I paid and eventually get the rebate, how do I correct it?  While this would seem to me to be a common occurrence (pay in one year, get a rebate in the next), I have been unable to find any information related to our situation.