You Can't File Your Taxes Online Without This Number. Here's How to Find It

Peter is a writer and editor for the CNET How-To team. He has been covering technology, software, finance, sports and video games since working for @Home Network and Excite in the 1990s. Peter managed reviews and listings for Download.com during the 2000s, and is passionate about software and no-nonsense advice for creators, consumers and investors.