TurboTax Online is such a scam.
My sons have used for the past few years and had simple returns. Always free. This year was a different story.
Son #1 was "upgraded" from Free to Deluxe while he was doing his return. He only had W2 income and a tiny amount of Interest income. NOTHING about his return should have triggered the deluxe. TT simply trade to scam him into upgrading. It took a while but we finally found a way to "downgrade" his version to free.
Son #2 was very similar BUT he qualified for the American Education Credit. Because of that one addition to his very simple 1 W2 and 1 1099-INT and extremely minimal amount of total income, he was forced to "upgrade" to deluxe. It ended up costing him ~$150 to process and e-file Fed and NJ returns. A full ~$70 more than I spent on filing my very complex returns via Desktop Deluxe version.
In both cases, TT never notified them when or why it upgraded. When it came time to submit they were just surprised with the cost.
Very disgusting Turbo Tax. You're taking advantage of the you low income filers who do everything online. Can't wait until we have more/better options born from AI by next year.