The first - and in most cases the only - step is to download all your transaction data from bibox and upload them into Koinly. There are a couple of ways you can do that:
If you want to use CSV files, you have to make sure to import your deposits/withdrawals and trades for ALL years - not just the current one!
That's it. The only other thing to keep in mind is to tag your airdrops/forks so they appear as Income on your generated cryptocurrency tax reports!