Hi @haseebsahaak ,
 
Marty here from Pigment Product Support. Thanks for your patience. 
The reason your YoY Calculated Item isn’t returning a result is that the metric your dynamic variable is based on (Set_Var_Last_Month_of_Year) is showing multiple boolean selections (one for the last month of each available year) and Calculated Items require a single selection in order to calculate. 
That being the case, we recommend making a new metric that will show both the last month of year (Dec), as well as select the current year. Something like:
MONTH(Month.'Start Date')=12 AND Month.'Start Date'> DATE(2024,12,31)
That way the boolean will return only a single selection and the YoY can be calculated. 
Let me know if you have any questions or need any further assistance. 
 
Cheers,
Marty
                
     
                                    
            Hi @Marty Leonard,
 
Thank you for the comment!
 
Selecting the current year manually is what I have kind of done currently in the calculated item. What I want is the calculation being dynamic, in the sense that it will calculate the variance based on the year chosen in the Pages.
 
Can I create a boolean metric for Month that gives me TRUE for the Month.Year selected in the Pages? Or, can the boolean metric restriction be removed from the dynamic variables? Maybe I could choose a dimension (Month or Month.Year) instead.
 
Regards,
Haseeb