these were for clients that had not been filed yet actually. Oddly enough all of them actually owed for 2023.  The only thing they all had in common was that they had not been filed yet through our office.  That is why were wondering if there was some type of data leak. That someone just filed a ton of returns and the rest that had been filed were rejected and the ones that had not been yet got through but the IRS somehow caught them and sent out the notice.