With about 140 million tax returns processed by the IRS every year, it makes sense to go paperless when filing, to save trees. But going green with your taxes can also save you money in the long run, too. According to CBS News, if you use an electronic file for your tax return, your error rate in filing your taxes is just about 1 percent. If you file your taxes manually using paper files, the error rate skyrockets to 20 percent. So going green by going paperless can actually help you save money and be error-free, too.