Guides 43 guides
Nonprofit Software Guides & Research
Clear, practical guides for nonprofit teams: IRS and state filings, and the software behind fundraising, donor records and day-to-day operations. Each guide links to the agency or vendor pages it is based on.
NPO Resources does not rank or endorse tools. We organize publicly available information so readers can make their own decisions.
- 01Source-basedGuides are built around provider pages and public documentation.
- 02Directory linkedArticles connect back to NPO Resources topic and tool pages.
- 03Neutral formatNo ratings, rankings, or endorsement-style labels.
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Nonprofit Accounting
Single Audit Requirements for Nonprofits ($1M Threshold)
Oct 4, 2026
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Compliance & Reporting
BCO-10: Pennsylvania Charity Registration and Renewal
Oct 1, 2026
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CHAR500
CHAR500: New York Charity Annual Filing, Due Dates and Fees
Sep 21, 2026
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RRF-1
Form RRF-1: California Charity Annual Registration Renewal
Sep 16, 2026
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AG990-IL
AG990-IL: Illinois Charity Annual Report and Audit Rules
Sep 16, 2026
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990-N
Form 990-N (e-Postcard): What to Have Ready Before You File
Sep 9, 2026
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AI
Claude for Nonprofits: Add a Grant-Writing Skill Fast
Sep 9, 2026
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990-PF
Private Foundation Rules: Five Restrictions and Form 990-PF
Sep 6, 2026
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Policy
Nonprofit Conflict of Interest Policy: What Form 990 Asks
Sep 4, 2026
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State
Charitable Solicitation Registration: What Triggers It
Sep 1, 2026
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1023-EZ
Form 1023 vs 1023-EZ: Which 501(c)(3) Application Applies
Sep 1, 2026
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990
Form 990 Filing Requirements for Nonprofits: 990-N, EZ, PF
Aug 31, 2026