DB table creation question

I am creating a database to keep track of our warranty returns. Currently we do not have anything to track warranty info besides a big excel file. I would like to keep customer data, product info and RMA data in separate tables but still keep them related. If I had table customers: custid Firstname Lastname Address Address2 City State Zip Phone Email And table RMA Rmaid Assignedto Loggedby Customerid Date Timespent Status Priority Closedby Completedby Dateclosed Billable Billed Cost Lastmodifiedby Lastmodifieddate What I want to ensure is that if john smith fills out an RMA request online a customer id is assigned to John, the RMA number is associated with Johns customerid and I need to figure out how to assign a product to John. Also if john has more than one product assign products so when I pull up Johns information I can see all of Johns products owned. I am running mysql latest version.. Any help would be greatly appriciated