Once you are logged into SimplyGiving, go to the "PROFILE" tab (on the left). The details of your organization is on that page. You are able to edit your nonprofit information from there.
A few clicks away and a little bit of typing can give you page a fresher look! Check out where you can do all this.
1- Click on Profile
Don't forget to scroll to the bottom of the page to click on "Update" to save the changes you have made.