Sorry no to both. You should start a new return for your son. You can't just copy yours. You can't remove all your info. Go up to File - New. Maybe you can download and import his stock sales to his return.
Be sure to save frequently, go up to File-Save or Save As. Save each return with a name you can tell apart from another one. Especially if another return has the same name or initial. Like a father and son. Or if you have the same name the second return might overwrite the first one.
