are you using the double quotes around Approve in your formula? If so, you'd need to use single quotes.

Thank you it works! by any chance, do you how to make the approved checkbox appear in the saved search? I cant seem to find the field. I

I'm not sure - it might not be available as a results column if you can't find it in your search. Maybe it's possibile to put the field id in a formula (text) to display the value?

I'd like to put in the result tab a formula when approved is checked, the field is "approved" if not checked then empty. can that be done?

case when {approved} = 'T' THEN 'Approved' ELSE NULL END

maybe that will work as a formula (text) field.

tried this already but it results to "error: field not found", thank you tho. appreciated :)