Dax formula error

Hi experts

I have the following DAX formula.....which do not work with certain visuals...but work with others. i am trying to work out the previous 12 months based on a selected year and month field from a slicer.... the first formula should dynamically work out the previous 12 months and the second the current period cannot see the error. 

Datefilter12Month:= 
VAR MonthsToLookBack =  12
VAR DataTableDate =   MIN('Date'[Date])
VAR DateTableDate = MIN('DateFilter'[Full Date])

VAR DateAddAlternative = EDATE(DateTableDate,-MonthsToLookBack)

RETURN
    IF(
        (DataTableDate <= DateTableDate)  && 
        (DataTableDate > DateAddAlternative)  ,
        
        1
        ) 
DatefilterCurrentMonth:= 

VAR DataTableDate =   MIN('Date'[Date])
VAR DateTableDate = MIN('DateFilter'[Full Date])



RETURN
    IF(
        (DataTableDate = DateTableDate),
           1
        )