10 Common IRS Mistakes and How to Correct Them (Before They Cost You)

Amended returns, identity theft issues, missing W-2s and more. Part of the Mac Neal LLC Resource Series: practical, plain-English guides for freelancers, side hustlers and small-business owners.

Inside this guide:

• The 10 most common IRS mistakes, what each one can cost, and how to fix it
• A step-by-step guide to amending a return with Form 1040-X
• A pre-filing error check to run before you hit "submit"
• Printable templates: a pre-filing review sheet, a fix-it tracker and a document request log

16-page PDF with checklists and printable worksheets. Updated October 2026 for tax year 2026.

General education, not tax or legal advice. Have a question about your own situation? Book a consultation at www.macnealllc.com.