I would Constrain the found set rather than extend it.
But if you want all records for year A and type C, you don't need two finds. A single Find that specifies both year and type will also work.
I'm using a calculation (Year( Get (CurrentDate)) -1 to find the previous year.
How do I use this calculation in the Edit Find Request: Criteria?
You don't, but then you don't have to.
Enter Find Mode [Pause:Off]
Set Field [ YourTable::YourDateFIeld ; Year ( Get ( CurrentDate ) ) - 1 ]
Set Error Capture [on]
Perform Find [ ]