The calculation is correctly done in TurboTax, but the instruction/explanation is still wrong, as of 3/9/21. This is really sloppy and confusing to your users. Please update this now, since it can be very confusing.
Example: Your AGI is $50,000 and you have $6,000 in medical expenses. You can't deduct the first $5,000, which is 10% of your AGI, but you can deduct anything over that.
