If you have a smart phone or ipad, there is a neat app that can do it for you called ID Photo Print. You can print on your home photo printer if you have one or you can pay additional for the app developer to print it and send it to your home address. Check it out.
The answers provided should not be considered legal advice. They are for general information only. It is always recommended you consult with an attorney prior to taking any action.
Post Office? Yes
FedEx Office? Yes
Just look for places that advertise passport photos ... they are the same thing.
PROFESSOR OF IMMIGRATION LAW for over 10 years -- This blog posting is offered for informational purposes only. It does not constitute an attorney-client relationship. Also, keep in mind that this is an INTERNET BLOG. You should not rely on anything you read here to make decisions which impact on your life. Meet with an attorney, via Skype, or in person, to obtain competent personal and professional guidance.