You can import your Nexo transactions by using the Nexo CSV Importer.
Follow the step-by-step instructions on the importer page in order to download a CSV file from Nexo and upload it to your CoinTracking account:
1. Login into your Nexo account (https://nexo.io)
2. Click the transaction tab at the top of the page
3. Select the start and end date for the transactions to export
4. Select All Types for transaction types and All Assets for assets to be exported
5. Download the CSV file and upload it here
Please note: If you are using Nexo Pro, you can import your transactions as described here: Nexo Pro Import