There was nothing strange in the csv; I got it directly from Coinbase.
I narrowed it down to my SHIB transactions.
$500 of SHIB was 12,1 million coins. Before TurboTax compiles the buys and sells into taxable events, the numbers were correct. But as a transaction it basically said i bought $490,000 and sold for the exact same price.
Sadly, there is no way for me to correct TurboTax's bad math
