The first and usually only step is to download all your data from Iquant and upload it into Koinly. There are a few ways you can do this:
Note that if you decide to use CSV files, you must make sure to import your deposits/withdrawals and trades for ALL previous years and not just the current one!
That's pretty much it. Don't forget to tag your airdrops/forks so they appear as Income on your generated crypto tax forms!