The first - and in most cases the only - step is to download all your data from dobi exchange and upload them into Koinly. There are a couple of ways you can do that:
If you decide to use CSV files, you have to make sure to import your deposits/withdrawals and trades for ALL years !
That's pretty much it. The only other thing to be vary of is to tag your airdrops/forks so they show up as Income on your generated cryptocurrency tax reports!