Hi tintin_haddock,
You are correct that you don't need to use CoinTracker if you don't want. If you are confident that you can calculate the cost-basis yourself, then you are fine to do it that way. CoinTracker is for those who don't have the knowledge/expertise to do it themselves. Or, if they do, they don't want to spend the time themselves or choose to use it to double-check their work.
TurboTax has a new crypto center you might be interested in. I encourage you to check it out!
