Read Only

I am writing a database that will keep track of help desk calls. I have a couple different table that I am using (Employee, Initial Call, Finished Call, others). After the Inital call has been registered into the database I want to be able to close the call as being either closed or cancelled. The Form Finished Call uses both the initial call table and the finished call table, so i created a query that would grab information from the initial call table and the finished call table. I then set the record source to this Query. I can get the information from the tables but when I try to enter information to update the finished call table it says it is read-only. How do I change that so it doesn't say read-only?