If you purchase any coins within Trezor, you will need to change the categorization from "Incoming" to "Buy" using the dropdown arrow.
How to export Trezor CSV?
Click here and log into your Trezor Online Wallet.
Go to Accounts
Select your first coin, and then you will select each account that you have for that particular coin.
Screenshot Courtesy of Trezor.io
Click the three little dots near the search option and export the transaction as CSV.
Make sure that the file is named as export-coin name-serialnumber.csv e.g. export-btc-123456890.csv
On ZenLedger, navigate to Exchanges > Trezor and upload your files.
Note- If your Trezor wallet is connected to the Exodus wallet and you have already imported the Exodus, then you will not need to import Trezor CSV. Importing from both sources will cause duplication.