Out of the box TE doesn't allows you to create Calculated Table in Power BI, but if you want you can easily do that.
To be able to create a calculated table, just open a Power BI file and connect Tabular editor to the PBI file.
Make sure to keep a backup of the PBIX file before you play with TE.
In Tabular Editor 3 go to Tools > Preferences > Features > Check allow unsopported modelling operations
In Tabular Editor 2 go to Files > Preferences > Features > Check Allow Unsupported Power BI features
To create a calculated table just right click on the Table and choose Calculated Table.
After you click Calculated Table or press ALT + 6 it will open a new window where you can write the DAX code for the calculated table.
Change the name of the column and press CTRL + S to save the model. TE will give a warning just press OK.
Now go back to Power BI and press Refresh Now option.
Voila, the calculated table is available in Power BI.