The first step is to download all your transaction data from ChainX and import them to Koinly. There are a couple of ways you can do this:
Note that if you decide to import CSV files, you have to make sure to import your deposits/withdrawals and trades for ALL years !
That's it. The only other thing to keep in mind is to tag your airdrops/forks so they show up as Income on your generated cryptocurrency tax forms!