How do you make line level field mandatory on transaction, I started with account but that didn't work so I created checkbox but now I don't see checkbox needs to true in condition pop up

You can't without a script for standard fields. For custom fields, you can set them as mandatory on the field setup, but it's then mandatory everywhere and there's no way to shut that off. You could set the custom fields as non-mandatory and script those as well.

Hmm I was hoping to do it with workflow darn itt

This can only be done on item sublist, but it is there under the make field mandatory action

Yeah That's how I am trying, I also created a custom field says make department mandatory if checked make department mandatory but I don't even see new custom field on condition pop up

on the line level?

Yes

I don't think you can use a line level criteria in that workflow

Hmm then how would you go about this? Like RJMNS mentioned this is only scriptable?

Yeah

Oo yeah that’s a good idea, if line account = x, and z , and department is blank send notification