Level 1

Warranty Period Custom Fields

I am creating the books for my company.  We manufacture wind turbines.  The legacy system is Microsoft Dynamics NAV.  We provide a warranty for items we produce.  I understand how to book and account for warranty work performed and received.  I would like to know where and how to add a warranty date custom field(s), start and end, so that my service department can see the items purchased by the customer and what the warranty dates are for those items.