We've put together this step-by-step video showing you how to export your Trezor Wallet with the online Trezor wallet software, to capture all of your transactions for taxes:
As a note, if you purchase any coins within Trezor, you will need to change the categorization from "Incoming" to "Buy" using the dropdown arrow.
Click here and log into your Trezor Online Wallet.
Select your first coin, and then you will select each account that you have for that particular coin (Account #1, Account #2 if applicable - see Red Square below. Each Coin/Account combo, you will do the following steps to create a CSV
Click on "Transactions" (Blue Circle).
Select "Export" and then the option "Export as CSV"
Make sure that the filename contains underscore(_) followed by coinname
e.g. account#1_btc.csv, account#1_ltc.csv, account#1_dash.csv, account#1_bch.csv.
On ZenLedger, navigate to Exchanges > Trezor and upload your files.