The first step is to download all your transactions from KeepKey Wallet and import them to Koinly. There are a few ways you can do that:
If you want to import CSV files, you need to make sure to import your deposits/withdrawals and trades for ALL years and 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 appear as Income on your final cryptocurrency tax forms!