I’m a little bit concerned about how gains and losses are calculated, as I have some very cut and dry examples that seem like they are way off. A good example is 1.6807 Bitcoin that I purchased at $6,060 per BTC (for a total sum of $10,185.04) and was put in a new wallet with no previous transactions, and immediately sold one minute later at $6,187.90 per Bitcoin for a total sum of $10,400. I have added this transaction to “Other Transactions” to isolate it, as there is nothing else in that category. This is very simple and should have a gain of $127.90 per Bitcoin, or a sum of $214.96. All of these numbers match up in Cointracker, but somehow the cost basis for the sold Bitcoin is showing up as $9,309.44, which gives me a +$1,090.56 gain. Please see this photo for proof:
I’m concerned that if something this simple is being calculated incorrectly then my remaining 15,000 transactions from 2017-2019 might also have issues. It is very hard to check every single transaction when you have as many as I do. Did I maybe do something wrong in adding of this transaction? Am I missing an important piece of the puzzle when it comes to understanding how Crypto gains are calculated?