On Coinbase :
Log in to your Coinbase account.
Scroll over the top right-corner icon next to notifications and select "Accounts"
Go to Statements from the menu on the left.
Locate Generate Custom Statement
Select All in assets and transactions.
Select CSV and click on Generate
The account history file will be downloaded in your Downloads folder by default.
Note: Coinbase allows you to download 1 year worth of trading data in a go. You might have to download the Statement multiple times to include all transactions from all fiscal years for your Coinbase CSV integration to be error-free.
On Kryptos :
Go to kryptos.io & signup using your Google account.
From the menu, click on Add Wallets/Exchanges. Go to the Wallets/Exchanges page.
Search for Coinbase or select it from the list below.
Now, click on the Coinbase icon.
Choose Upload CSV
Click on Import Your Transactions. All transactions are imported and tagged by default.
If you wish to import custom history, select Advanced Options. Now you can specify the start and end date of your transaction history.