Need to return something when is the earliest i can do that?

Walmart stores customer service desk is open between 8am-10pm

I'm from Philadelphia. Check Thier website.

They always ahave a designated register for returns and exchanges after hours. So you may make your exchange at any time, just wait a little bit longer while the overnight manager comes. After 7 am, you will find most of the customer service desks open and all will be open after 8 am.

Any time is open

Any timr

You can return on the same day