I need to format columns in in the table

[AimeMfinda]

Like Month_Year = FORMAT('d_Table'[Date], "mmm_YY" in the actual version there is an arror 

[amitchandak]

@AimeMfinda , what is the issue you are getting. I tried a new column in date table like this

Month Year = FORMAT('Date'[Date],"mmm_yyyy")

and it is working

[StefanoGrimaldi]

 Month_Year = FORMAT('d_Table'[Date], "mmm yyy"

also if you select the column on the table there appears a column tools tab there you have some formating options also for these.