Every US 501(c)(3) has a free marketplace page on Better Giving, that can be used right now by donors to donate to that nonprofit.
To personalise the page, make use of all the benefits of the free Better Giving service and increase donations, just claim the page.
Here's how:
Vist the Better Giving marketplace
Search for your nonprofit's name and click to visit the free page that is ready for donations
Scroll down the page and click on the 'claim this organization' button
Sign up and continue the registration process to claim your nonprofit. That process is also outlined in this article.
We shall then be in touch after we have carried out the necessary security checks to confirm your account.
Here's a short video showing how to claim your nonprofit. (1min 50secs)