If you forgot the password to the Google Account that you used in your Google for Nonprofits request, you can reset the password here.
If you forgot which Google Account is linked to Google for Nonprofits, you can try searching your inboxes for the Google for Nonprofits confirmation email. It was sent from firstname.lastname@example.org.
If you're still not sure which account you used, please request administrative access to your organization's Google for Nonprofits account. Your request will be processed in about 14 business days.