The Sigma Foundry blog
Practical guides for the business side: government contracting, selling online, AI that does real work, and tax and money.
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AI Tools for Freelancers: The Practical 2026 Guide
Reading time: 12 minutes Updated March 2026 — covering OBBBA, AI layoff trends, and the tools freelancers are actually using. If you're a freelancer using AI, you've probably already discovered that the generic advice — "just use ChatGPT!" — isn't a strategy. The real question is which workflows to automate, which tools actually save time
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April 15 Is 32 Days Away: The Freelancer's Tax Deadline Guide (Most People Miss Half of It)
TAX STRATEGY • 9 MIN READ • AI FOR BEGINNERS April 15 Is 32 Days Away: The Freelancer’s Tax Deadline Guide (Most People Miss Half of It) April 15 isn't one deadline — it's two, and the second one catches freelancers and solopreneurs every year. Add the 2025 OBBBA deductions most self-employed people are leaving
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How to Come Out of an AI Layoff Better Positioned Than You Went In
CAREER STRATEGY • 10 MIN READ • INTERMEDIATE AI When AI Takes Your Job: The 30-Day Pivot Playbook 51,686 jobs eliminated in the first 73 days of 2026. Block, Meta, Oracle — the AI restructuring isn't theoretical anymore. If you've been laid off, or you can see it coming, here's how to use the same
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How to Use AI to Maximize Your 2025 Tax Refund (and Keep More Cash Every Month in 2026)
TAX STRATEGY • 8 MIN READ How to Use AI to Maximize Your 2025 Tax Refund (and Keep More Cash Every Month in 2026) The One Big Beautiful Bill created 7 new tax deductions retroactive to January 2025. Most people will leave thousands on the table. Here's how to use ChatGPT or Claude to find
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How to Validate AI Legal Research: The 7-Pass Framework That Catches What ChatGPT Gets Wrong
AI tools hallucinate legal citations. This 7-pass validation framework catches fabricated cases, wrong jurisdictions, and outdated statutes before they cost you.
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OBBBA Tax Changes 2026: All 7 Provisions Explained + How to Adjust Your W-4 Now
All 7 OBBBA tax provisions explained: overtime, tips, auto loans, SALT cap, senior deduction, 529 K-12, and QBI. What changed and how to adjust your W-4 now.
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How to Adjust Your W-4 After OBBBA (2025 Guide)
Step-by-step guide to adjusting your W-4 after OBBBA. Capture new 2025 deductions monthly instead of waiting for your April refund. IRS Estimator walkthrough.
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AI Job Search: How to Use ChatGPT to Land Your Next Role
50 AI prompts for job searching — resume tailoring, cover letter writing, and interview prep. Cut application time by 80% with targeted ChatGPT prompts.
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LinkedIn Ghostwriting With AI Templates
How B2B founders use AI ghostwriting templates to maintain a LinkedIn presence without the daily time sink. 40 templates and a 30-day posting system.
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Best AI Prompt Library 2026 — 75 Professional Prompts
75 battle-tested AI prompts for professionals. Organized by use case — emails, reports, strategy, research. Works with ChatGPT, Claude, and Gemini.