After you have created and funded your own tastytrade account, log in to it through WealthCharts! You can do this by clicking on the System Status button located at the top right corner of your platform.
If you have not yet completed the Disclaimer, you will want to make sure to do that first, and then you can log in! All that is required is to fill in your name and date, click on the hyperlink to review the Disclaimer, and then you are able to push the Disclaimer through.
After that, you will see a few different broker options. Select tastytrade, and then you will be taken to their login portal. If you have multiple accounts, you will see a drop-down to choose which account you want to log into. Finally, click the blue Login button, and you will connect to your tastytrade brokerage account through WealthCharts.

Take a look at related articles below on using the Trading DOM and on-chart trading for the next steps!