An attachment to support the information reported on Part III, line 29, Research and development costs, is no longer required.

Instructions for Part I, line 12, clarify that assets and liabilities must be reported on lines 12a-12d as positive amounts.

Instructions have been added to clarify reporting by traders in securities or commodities that have made a valid election under section 475(f) to use the mark-to-market method to account for securities or commodities. See Traders in securities or commodities, under the instructions for Part II, line 14, for more information.

The IRS has created a page on IRS.gov for information about Schedule M-3 (Form 1065) and its instructions, at www.irs.gov/form1065. Information about any future developments affecting Schedule M-3 (Form 1065) will be posted on that page.