@qbteachmt Soon enough the world is going to have access to the story, when a Tax Court petition is filed.  Although, at that point only the taxpayer's name and state of residence will be shown.  You'll have to visit the courthouse in DC to see the petition and other details.  And the SSN should be blacked out, if the taxpayer has competent representation. 

If that's the case, the next step is to anticipate the same problem for 2022 and 2023 and prevent it for 2024.  I'm fairly sure that this relates to the Credit Karma subsidiary of Intuit, and you're right, just because we are Intuit software customers doesn't mean we know anything about their side gig.   Since we now know that the taxpayer is retired (an online article indicates, since 2018), that explains why he may not have seen the 1099-K sent to his former work address (301 Kent).  Someone there should have access to the account where these payments are being made and forms are being sent, and change the data from SSN to EIN.  

The monthly payments shown on the 1099-K could be a compilation of dozens of individual payments.  The bank accounts that need to be "audited" are those that received these payments.  That is what IRS is going to want to see.  Since the payee seems to be a conference of churches, maybe this money is coming from member churches, rather than from church members.  I have no clue why an amended return would be filed in this situation.  Was the explanation, "not my money, they shouldn't have used my SSN" ?  I hope it wasn't the "trick the IRS computer" maneuver of adding it all in to a Schedule C and then subtracting it all out.