Once you've created a New Task Template, navigate to the Task Menu to add further Task Tags to the Template.
Clicking on the Task Template opens the Task Detail Page, where you can those further Tags.
Add multiple Task Tags by separating the tags with a comma "," as you can see in the image below.
NOTE: Task Tags must have no spaces or special characters. If you need to create Task Tags from multiple words, then remove spaces or use an underscore to separate words.
Example: Standard_Bathroom_Clean OR StandardBathroomClean
Further Explanation of multiple Task Tags