Many more corporations now must file their tax returns electronically, and the AICPA offers an online informational aid to help CPAs meet their corporate clients’ e-filing requirements. Corporations with total assets of $10 million or more that file at least 250 returns annually, such as W-2s or other employment tax forms, are required to e-file their forms 1120 or 1120S for tax years ending on or after Dec. 31, 2006. In the previous filing season, the threshold was $50 million. The AICPA guide, in Microsoft PowerPoint format, is available at http://tax.aicpa.org/Resources/Corporations+and+Shareholders/ . The IRS also offers corporate e-filing information and resources at www.irs.gov/businesses/corporations/article/0,,id=146959,00.html .