I had no trouble handling my basic W2 and mortgage interest deductions.
Where it got tricky was when I had stock income from RSUs. I found a “professional” who sucked, so I figured out how to do it correctly myself and never looked back.
Also, if you have multiple mortgages due to a refinance, that can get tricky; TurboTax has a nasty bug on this so you might want to pay for an hour of an expert’s time if there’s any new scenario you don’t understand.