greetings

I have code that generates names (eg T2_Master)
Dim TaskWSName as String
TaskWSName = "T" & ActiveSheet.Range(E8) & "_Master"

Later, I want to have code that refers to Worksheets having these names.
Here's an eg:
Worksheets("PrintReport").Range("A1").Formula =
"=INDEX(T2_Master!E:E,MATCH(A8,T2_Master!A:A,0 ))


How do I refer to T2_Master! in the INDEX or the MATCH statements? Using
TaskWSName! doesn't work.

Thanks in advance
anny