Change the "Grouping" in the Table based on User Input (Slicer)

New to power BI and kind of stuck at proper way of accomplishing this task. Any examples to work will be helpful.

Basically the "Grouping" the dimension column which is in the table should change based on the Slicer.

Slicer can be static Text like

"Fiscal Year" , "Fiscal Month in Year". 

Now, if we select "Fiscal Year", the first column should come from a Date Dim table which has column called "Fiscal Year" and there is other column too which is "Fiscal Month in Year" and it should group it based on that column if we select the 2nd value in the Slicer...

I tried an example using SELECTEDVALUE in the DAX but that returns the TEXT and not the actual column...