Here's what you should do
The first step is to download all your transactions from B2BX and upload it to Koinly. There are a couple of ways you can do that:
- B2BX does not offer any API, so you will need to download your transaction files from their website and upload them into Koinly manually.
- If the above method(s) is not possible for you, you can also add the transactions one by one via Koinly's web interface.
Note that if you want to import CSV files, you have to make sure to import your deposits/withdrawals and trades for ALL previous years - not just the current one!
That's pretty much it. The only other thing to be vary of is to tag your airdrops/forks so they appear as Income on your generated cryptocurrency tax reports!