I have done my own taxes since I started working after high school. The online software works pretty well, especially for simple tax situations. Through the years my taxes have become more complicated, but in a stepwise fashion that allows for a little bit of learning each year. I like knowing the why behind my tax bill, and completing my own taxes gives me [a sick] personal gratification. I haven't looked into a CPA, although I've been tempted. From a purely financial standpoint, it may be cheaper to work the extra day, but if everything flows well you can save a bit of money.
I have learned to manage W-2, K-1 for wife, backdoor roths, investment accounts, itemized deductions, 529 account, state taxes (simpler than federal), et cetera. You can find instructions for all lines on the IRS website, and some simple internet searches can also prove helpful.
If you have already submitted you taxes for the year, you could try doing them yourself online (but don't submit them, of course) to see how hard/simple it is for your situation. You may be pleasantly surprised. Good luck