Tax Guide Form 1040 Schedule C – 9 Tips for Business Tax Reporting IRS Form 1040 Schedule C – for reporting your business’ profit & loss. Moving on through PDFfiller‘s review of the 1040 schedules, this post focuses on IRS Form 1040 Schedule C. ... Tax Guide 1040 Schedule C: How the IRS Works for Your Small Business This post was updated in April 2018 So you’ve started a small business: you might be freelancing, selling homemade soap at craft fairs, building state-of-the-art dog houses, or serving ...