If you would consider building a spreadsheet to do your taxes, you can do it by hand without one.
TurboTax can handle any complexity of tax return and sells a ton of copies every year (same for H&R Block software), but that doesn't mean everybody needs it. If you have a straightforward return, you don't need it.
Also, there are online sites you might be able to use for free depending on your income.
IMHO the downside to tax software is it makes it difficult to understand WHY the numbers are what they are. It can be useful to understand the tax rules so you can take appropriate action if indicated.
Case in point: I once worked with a guy who sternly warned me if I worked enough overtime, I could actually have a SMALLER net pay since the taxes would go up and up with more overtime. I tried to explain withholding rates but the concept of percentages was too much for him. Could not convince him he was wrong.