Productivity Don’t Miss the Deadline for Reporting Your Shareholding Income with Form 1120S Schedule K-1 LLC members and S corporation owners are required to report their income on an annual basis. A shareholder’s share of income for a partnership or an S corporation should ... Tax Guide Doing Your Share with the 1120 S Schedule K 1 IRS 1120 S Schedule K 1 and your role as a shareholder Continuing with PDFfiller‘s review of corporate tax forms, we focus on IRS 1120 S Schedule K 1 ...