I have never used TurboTax, but I have used H&R Block online filing every year of my adult life, and haven't had any issues.
One year I was curious about my refund (thought I was paying more than I should) and brought my return in to an actual brick & mortar H & R Block office, and they told me that my return just about perfect, but they urged me to increase my monthly withholdings to avoid paying taxes at tax season, which turned out to be good advice for the next year (would have had to pay much, much more than the previous year, my withholdings were WAY too low).
Not sure why you were downvoted. I used to use TurboTax until about a decade ago when I switched to H&R Block. In my opinion H&R Block's UX is superior to TurboTax's and I didn't run into nearly as many dark patterns as I used to. Granted, TurboTax's website could've (and apparently did) change a lot in the time being.
It's always best to try and get a $0 refund with $0 owed. Big refunds may seem cool but you are really just making an interest-free loan to the government.
H&R Block seems very poor quality. It isn't capable of keeping track of state non-taxable income that's taxable at the federal level, and consistently tells me I owe my state thousands more than I really do.
One year I was curious about my refund (thought I was paying more than I should) and brought my return in to an actual brick & mortar H & R Block office, and they told me that my return just about perfect, but they urged me to increase my monthly withholdings to avoid paying taxes at tax season, which turned out to be good advice for the next year (would have had to pay much, much more than the previous year, my withholdings were WAY too low).