Yes. Your donation is tax-deductible to the fullest extent allowed by law.
Immediately after you've donated via a nonprofit's fundraising page, you will receive an email from firstname.lastname@example.org containing a receipt of your donation that you can use for tax purposes.
Here's an example:
Additionally, to assist donors who file U.S. taxes, we have arranged easy and secure access to a personalized summary of the donations made to nonprofits that used our fundraising platform in the last year.