The IRS has tons of great resources, and you can even call them up. Each form has a companion instruction booklet (online PDF), and sometimes those instructions refer to an IRS publication with additional clarification. If you can read a technical blog post and follow a clear procedure, you can file your own taxes.
I've been filing taxes the (new) old-fashioned way for my wife and I for the last 3 years. That includes 330+ days abroad (Federal Earned Income Exclusion), a sole proprietorship, an LLC, an ISO exercise (AMT), 3 separate states, and 5 separate cities.
Each time, it has taken me a full 12-16 hours (a solid day or two on a weekend) for federal, multiple states, and multiple cities. It's not the most fun, but by the end of it, I understand our taxes and finances a lot better. We can arrange our situation better going forward. We can keep more appropriate records to make the next year's filings easier. And most of all, I have the satisfaction of not funding an industry that lobbies against my interests.