The address entered in the Personal Info section of your return will be shown on the top of your Form 1040 and can be a post office box. This should be your mailing address since any IRS correspondence would go to that address.
There are certain places where a physical address is required, such as when claiming a home energy credit.
**Say "Thanks" by clicking the thumb icon in a post
**Mark the post that answers your question by clicking on "Mark as Best Answer"