showing yesterday's data in SSRS

Hi Guys,

I need some help with an expression for SSRS. I need to get only the data for the last date in the query . I just want the previous date information whereas on Monday, it's going to be Friday's information.

I tried with this as a test but is not working.

=IIF(Fields!OpenDate.Value >= DateAdd("d",-1,today),COUNT(Fields!InFxO.Value), 0)

I need it for to create a dashboard and show yesterday's factory output.