How to add a where clause to a custom report on the Custom SQL tab

SUGGESTED

We are trying to add a where clause to a custom report on the Custom SQL tab when choosing "Open Print Form"

We want to add a where clause to be able to easily run the report for selected employees instead of selecting the employees on the Report Filter. Selecting the required employees using the Report Filter is taking too much time and is a tedious task.

Adding a where clause selecting only certain employee numbers will be a lot easier and faster.

Tried the below but keep getting an Incorrect Syntax error:

Please advise - never used the custom sql option before.

[EmployeeCode] IN ('0001','0002')