The first and usually only step is to download all your data from Koinim and upload them into Koinly. There are a few ways you can do that:
If you want to import CSV files, you have to make sure to import your deposits/withdrawals and trades for ALL previous years and not just the current one!
That's it. Don't forget to tag your airdrops/forks so they show up as Income on your final cryptocurrency tax documents!