Using Column Name as variable

Hi @jafernandezpuga Thanks for the response , the suggestion works, but when I try to pass it into a switch parameter I have this error The expression refers to multiple columns. Multiple columns cannot be converted to a scalar value.
The expression refers to multiple columns. Multiple columns cannot be converted to a scalar value.

This is the way I am using it

TestTable3 =

VAR _filtera =

FILTER(

‘Hours Table’,

VAR t = ‘Hours Table’[Team]

RETURN

t = “a”

)

VAR _filterb =

FILTER(

‘Hours Table’,

VAR t = ‘Hours Table’[Team]

RETURN

t = “b”

)

VAR ST =

SWITCH(

SELECTEDVALUE(‘SelectTeams’[Teams]),

“A”,_filtera,

“B”,_filterb,

_filtera

)

VAR b = CALCULATETABLE(

SELECTCOLUMNS(

‘Hours Table’,

“Test”,‘Hours Table’[Hours]

),

ST

) return b

Thank you