Service Date for Payables

Good Morning,

I'm looking to add a “SERVICE DATE” field for our AP transations - At first I was going to add it as an ACTION TYPE - however I think CUSTOM FIELD maybe more approprate. I've entered both to run a test - but what I really need is for this data to then print on a GL or project detail report for our staff to deliniate Service date from Invoice date and we already use the description for other items. Any help would be greatly appreciated!

Megan