How do I return defective cord still under warranty by mail

There is nothing in my order referring to “Start A Return.” I believe returns are for the first two weeks—maybe a month. I’m a little bit past a month. I need to know how to return my defective product that is still under its 1-year warranty, by mail, for a replacement.

Thank you. You’ve at least given me a way to contact Apple about the problem. Thank you for taking the time to give me this information.