The first and usually the only step is to download all your transaction data from Edge App and upload it into Koinly. There are a few ways you can do this:
If you want to import CSV files, you must make sure to import your deposits/withdrawals and trades for ALL previous years - not just the current one!
That's all you have to do. The only other thing to keep in mind is to tag your airdrops/forks so they appear as Income on your generated crypto tax documents!