Tax Guide IRS Form 1065: You’ll Want to Share This with a Partner IRS Form 1065 Return of Partnership Income Are you a member of a business partnership? If so, this PDFfiller post on IRS form 1065 Return of Partnership Income is ... Tax Guide Shareholders’ Exclusive: Form 1120S Schedule K-1 Any shareholder of an S-Corporation need to use the Schedule K-1 of Form 1120S to report his or her pro-rated share of net income or loss from that ...