The first - and in most cases the only - step is to download all your transaction data from Cobinhood and upload them to Koinly. There are a couple of 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 years and not just the current one!
That's pretty much it. Don't forget to tag your airdrops/forks so they show up as Income on your generated crypto tax reports!