Does anybody have a sample script to automatically check a standard checkbox when a custom checkbox is checked when the record is created regardless of context? If not possible upon creation, then after initial creation like editing after savings. My specific use case is I want to check the Billable box under the Expenses sublist in the Check transaction when a custom checkbox is checked. Both are in the transaction line. Thanks!

Have you tried using a workflow? Seems like an easy enough process if its available on the workflow?

I can't access the Expenses sublist of the Check transaction through a WF.