Here's what you should do
The first and usually only step is to download all your data from Bits Blockchain and upload them into Koinly. There are a couple of ways you can do that:
- Bits Blockchain does not have any API, so you will need to download your CSV files from their web UI and import them into Koinly manually.
- If you only have a few transactions and the above method(s) are not possible for you, you can even add the transactions one by one through Koinly's web interface.
If you want to use CSV files, you need to make sure to import your deposits/withdrawals and trades for ALL previous years - not just the current one!
That's all you have to do. The only other thing to keep in mind is to tag your airdrops/forks so they show up as Income on your generated cryptocurrency tax forms!