Here's what you should do
The first step is to download all your transaction data from BL3P and import them to Koinly. There are a couple of ways you can do this:
- As BL3P has an API, the most efficient way to do so is to simply connect your API keys (API key, API secret). Then Koinly will import all your transaction data automatically, and you can create your tax form.
- If you don't have access to your API keys, you can also import transactions by importing your CSV files.
- If the above method(s) is not possible for you, you can also add the transactions manually through Koinly's web interface.
If you decide to import CSV files, you need to make sure to import your deposits/withdrawals and trades for ALL years !
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 crypto tax documents!