Yes.
If you are an agent for your client in the Tax Traders platform, your client's use of their Taxi account will be visible to you through the Tax Traders account that gets set up for your client as part of the Taxi onboarding process.
If your client has signed up to Taxi and also has an existing account with Tax Traders, these will automatically be linked when they sign up to Taxi and you will be able to see them when you login.
If your client is not on your Tax Traders account, you can contact Tax Traders to have them added.