everyone seems to think that if you make one mistake on your taxes or do something the IRS doesn't like that it results in an audit. but that's not really the case. as mentioned in my other thread, when i bought a 2011 leaf i got a letter from the IRS asking for proof that i really bought an EV. eventually over the phone they told me that congress had directed them to crack down on EV tax credit fraud and mortgage deduction fraud. in the end i sent them my bill of sale and that was that. they accepted that the credit was legit.
IMO that's the worst that's going to happen here. if they flag it, they'll ask for proof. i'll send them the proof that the system has been in service since early november 2020. if they don't like that, then i'll claim it next year. if there are underpayment penalties or something they are going to be small compared to my tax bill. they should be << 4% of the cost of the powerwall system.
and relevant to the title of this thread, i also got a bill even though inspection has not occurred. i called up my advisor and asked him to make sure they don't mark the account as delinquent because i'm not going to pay before inspection occurs. he said he'd do that. we'll see.