Hello! We are near to completion of a whole home remodel. I understand that we will need to sign the CA waiver and release form to protect ourselves from subcontractors demands in case our general contractor did not fulfill some of his obligations. We have a final bill, but our contractor did not include the retainer sum which we paid him to start the job. He had been challenging to deal with and even dishonest occasionally. What is the proper way to exclude the retainer portion from the final payment when completing the waiver and release?