by Claudine Zap Tax day is just around the corner. Procrastinators (you know who you are) are heading to the Web for help putting off the inevitable. Not surprisingly, " tax extension " has become a very popular term in the last week, taxing the Search box with a 3,300% increase. Other deadline-induced lookups include " file for a tax extension ," " irs tax extension due date ," and " free tax extension online ." There is good news and bad news about tax extensions.