Click on the Sync Transactions button to go to your CoinJar account.
After clicking the button, it will take you to the CoinJar website where you can sign in to authorize CoinLedger to import your trades.
You may need to enter 2-Step Verification code. This can be over a text message or using an authenticator app.
After clicking Allow, it will take you back to CoinLedger. To start the trade importer, click on the Sync Transactions button.
After the importer completes, you will see this notification telling you how many trades were imported or if your trades are all up to date. Once you see this, you may continue on to the next step.