The first and usually the only step is to download all your transaction data from BTC Trade UA and import them into Koinly. There are a few ways you can do that:
If you want to import CSV files, you need to make sure to import your deposits/withdrawals and trades for ALL previous years - not just the current one!
That's pretty much it. The only other thing to keep in mind is to tag your airdrops/forks so they appear as Income on your final crypto tax forms!