Using IF to look at a Checkbox field and return "XYZ"

PStowers

I am creating a Status field using IF function.  I'm trying to look at a check-box field and return  "status" (ex. "Tooling Complete") if the box is checked.  I've tried IF(NOT(ISBLANK(... but a check-box formatted field seems to register as not-blank whether it is checked or unchecked.

 

Does anyone know a different function I can use in this case?

L_123

=if(checkbox1 = true, returncolumn1)

=if(checkbox1 = 1, returncolumn1)