How to change field values

I am still very new to PowerBi and would like to ask for some advice.

I have a SQL DB, and the table I am referencing has a STATE column.
The values in this are like WA, NT, SA, NSW, QLD, VIC.

I am trying to create a Filled Map, but can`t get the states to map correctly.

So, my question is, is there a way to make PowerBi read the State column, and if the value is "NT", have it use "Northern Territory" to plot on the map?

Any advice would be greatly appreciated.