If you can't get through to the IRS, your local CPA, or a hotline provided by your tax-software provider, you might be able to find answers online (IRS instructions can be dense reading, but they're not hard to find). Otherwise, maybe it's time to buy yourself some extra time....
Mary Knox Merrill/海角大神/File
A program at Bunker Hill Community College in Boston helps low to moderate income taxpayers file their taxes.