The first and usually the only step is to download all your transactions from lakebtc and import them into Koinly. There are a couple of ways you can do this:
Note that if you want to use CSV files, you must make sure to import your deposits/withdrawals and trades for ALL years - not just the current one!
That's it. The only other thing to be vary of is to tag your airdrops/forks so they appear as Income on your final cryptocurrency tax reports!