How to Reach the Right IRS Office the First Time: A Guide for Nonprofits
Nonprofits have two IRS phone numbers, not one. Learn which to call for exempt status vs. e-file issues, and what to have ready before you dial.
The Public Support Test, Explained: How Schedule A Protects Your Nonprofits Tax Exempt Status
Every organization that applies for 501(c)(3) status starts out classified as a private foundation in the eyes of the IRS — a designation that comes with stricter rules, higher taxes, and less flexibility. Schedule A and the public support test are how your organization proves otherwise, demonstrating year after year that it's accountable to a broad public rather than a handful of funders. Here's how the test works, why one large gift won't disqualify you, and what's at stake if you fail it.
What to Do If Your Determination Letter Has an Error or the Wrong Effective Date
Your IRS determination letter proves your 501(c)(3) status to donors, grant makers, and state agencies — so a misspelled name, wrong EIN, or off effective date is worth fixing. Here's what each error can mean, and how to correct it.
501(c)(3) vs. Other 501(c) and 509 Classifications: Which Fits Your Organization?
Not every tax-exempt organization is a 501(c)(3) — here's how the IRS classifications differ, and why choosing the right one protects an organization's mission long after the application is filed.
How to Complete the Balance Sheet on Form 990-PF
Form 990-PF's Balance Sheet asks private foundations for a detailed look at assets, liabilities, and net assets — at both book and fair market value. Here's how Part II breaks down, line by line, and what determines which columns your foundation needs to complete.
2026 Nonprofit Webinars You Won’t Want To Miss
Tax990's latest webinar learning opportunities for nonprofits.
Stop Guessing at Grants. Join Our Free July Webinar Series.
Securing grant funding for nonprofits is one of the most powerful ways to grow your mission. This July, Tax990 is hosting a free four-part grant writing webinar series with Senior Certified Grants Specialist Mary Louise Resch. Four sessions. Every Monday in July. Completely free.
Peer-to-Peer Fundraising for Nonprofits: Setup, Tools, and What Actually Works
If your nonprofit is ready to grow its donor base without stretching your team thin, peer-to-peer fundraising might be your most underutilized tool. It turns your existing supporters into fundraisers — expanding your reach, attracting new donors, and deepening engagement all at once.
Can a Veteran Organization Be Tax-Exempt? IRS Requirements Explained
Understanding whether your organization qualifies under 501(c)(19), 501(c)(3), or 501(c)(4) can make the difference in how you fundraise, advocate, and serve your mission.