How does it work?

The first step is to download all your transactions from Kraken and import it to Koinly. There are a few ways you can do that:

As Kraken has an API, the most efficient way to import everything is to just connect your read-only API keys (api key, api secret). Then Koinly will download your history and you can generate your tax document.
If you don't have access to your API keys you can also import transactions by uploading your CSV files.
If the above method(s) are not possible for you, you can even add the transactions one by one via Koinly's web interface.

Note that if you decide to import CSV files, you have to make sure to import your deposits/withdrawals and trades for ALL years !

That's pretty much it. Don't forget to tag your airdrops/forks so they show up as Income on your final cryptocurrency tax reports!

Importing Kraken transactions automatically via API

Follow these steps to get your API keys:

Sign into Kraken
Navigate to Settings -> API
Click the Generate New Key button
Enable the following permissions:
- Query Funds
- Query Closed Orders & Trades
- Query Ledger Entries
Click the Generate Key button
Copy the API Key and Private Key

Importing Kraken transactions manually via CSV files

Follow these steps to download your transaction files:

Open the Kraken History > Export page
Select Ledgers from the drop down list and All in time period
Click on Submit
Wait a few seconds until the Download button appears, then click on it
Upload the downloaded file to Koinly