I have this formula working on an older version of this report: COUNTIFS(Transactions[Year],B$2,Transactions[Mo No],"<="&MONTH(B$3&" 1")).
I have copied and pasted it into a new but similar project: COUNTIFS(Table1[Year],C$3,Table1[Month],"<="&MONTH(C$4&"1")) I am getting back a 0 result...