Kraken reports incorrect data on their amended 1099-DAs

Kraken is apparently having a lot of trouble following the new 1099-DA reporting requirements in the US... First, they were extraordinarily late, only providing their initial forms months after the legal deadline. And then today, after the tax deadline, they issued amended 1099-DAs which often have completely incorrect numbers.

To get the correct proceeds number for a Kraken crypto→USD sale:
- Export your ledger (not your trades) to a CSV file.
- For each trade, there will be two lines at the same time with the same refid. For the line where amount is negative, amount (as a positive number) plus the fee listed on that line is the amount of crypto that was disposed of.
- On the other line for the same refid, where the amount is positive, the amount minus the fee listed on that line is the proceeds. This is the proceeds number which should be reported on 1099-DA.

(Note that partway through 2025, Kraken changed how they collected fees: they used to collect it on the output side, but they changed it to instead take it on the input side. So you have to know how to handle it both ways.)

With today's amended 1099-DA, Kraken actually used the "amountusd" column of the ledger. This column is an approximate valuation of the asset being sold, not the actual proceeds of the transaction. It should only be used for e.g. crypto→crypto trades, where there is no canonical USD amount available. Using the amountusd column for a crypto→USD transaction is completely incorrect, and is an utterly embarrassing case where the team who coded up their 1099 processing didn't actually understand how their internal accounting works.

It's possible that for some people, the amended 1099-DA actually fixed something that was incorrect on the previous 1099-DA, so you shouldn't just ignore it, but I definitely wouldn't actually rely on today's amended 1099-DA, since I'd guess that it's off by at least a few percent for most people. And after this show of complete incompetence, I wouldn't particularly recommend Kraken in general...