After doing my own taxes for 49 years, and never had any issues. Last year I used a local CPA tax agency and they made mistakes that cost me first 862 USD for their services, which was actually well worth it as I had 3 state income taxes to deal with. But the Feds did not like what they did and sent me a bill with no explanations and I had to pay the IRS another 592. I have an IRS account and all it seemed to say was something about advance child care credit? I have never been married, no kids, never touched any thing to do with that, etc.
This year, I only have one state I worked in, but for grins I tried the deluxe downloadable Turbo Tax. That really was pretty easy to use. I had Obamacare for a few months, some slot machine w2Gs, some stocks, dividends, an excess ROTH IRA contribution. Nothing complicated and I had already roughed out the Federal taxes. Turbo Tax came up with the exact same amounts as I had. The nice thing was it then spit out the one Tate income taxes at the push of a button. Well worth the 105 bucks.
In your case I would suggest you pay turbo tax a little bit more and get access to their real live person tax expert, or even let them take a shot at doing your taxes. Not a bad thing to try pricewise.