Describe the problem:
I used an API key to sync my Binance US account with Koinly. It is missing the purchase basis on many sells.
Which exchange/wallet is this regarding?
How did you import data into this wallet?
API
What have you tried to fix this so far?
I downloaded a full tax report CSV file from Binance, from this section on their site:
Looking through this CSV, it appears that purchases in Category “Quick Buy” do not sync and are missing in Koinly.
I also noticed this may have happened for other customers, see https://discuss.koinly.io/t/binance-transaction-fees-showing-as-missing-purchase-history