Here's what you should do
The first - and in most cases, the only - step is to download all your transactions from C-CEX and import them to Koinly. There are a couple of ways you can do this:
- C-CEX does not have an API, so you will need to download your transaction files from their web interface and import them to Koinly manually.
- If you only have a few transactions and the above method(s) are not possible for you, you can even add the transactions manually via Koinly's web interface.
If you decide to use CSV files, you have to make sure to import your deposits/withdrawals and trades for ALL years and not just the current one!
That's it. Don't forget to tag your airdrops/forks so they appear as Income on your final crypto tax forms!