In the video at ~3:30, he mentions that the NY state govt says he owes ~$45.7K for one quarter - he says the amount owing would total high six figures, maybe low seven figures if that amount owing would be extrapolated from one quarter to the whole audit period in question (as he says in the video - more money than he is worth).
In a later video ( https://www.youtube.com/watch?v=OXvuOD1D0gM ) where he pays the amount owing, he states that he has to send ~$6700 to the govt.
So over one year of state govt auditing reveals ~$6700 that the state govt didn't get.
But he's also mentioned in the video where he's getting audited again ( https://www.youtube.com/watch?v=YvHt1Q3k-44 ) that he, via the first audit, has discovered he actually overpaid his taxes. He may try to claw back that money in the second audit.