I have two customers set up with multiple jobs under each.  The parent company (not set up as a customer) is now making one payment for both customers & jobs.  How do I apply this payment to multiple customers & jobs?  Is it best to merge the customers?  If I set up the parent company as a new customer and merge the two existing customers into the new customer do I lose any prior year transactions?  After the merge will I see the existing jobs under the new customer?  

Thanks for the help