Line 12e on Form 1040 shows either your itemized deductions or your standard deduction, whichever is higher. Because you are over 65 and filing Single, you are entitled to the higher standard deduction for your age (new senior deduction).
Although Schedule A totals $18,374, medical expenses are only deductible to the extent they exceed 7.5% of your AGI, so the full $10,669 isn't deductible. After that limitation is applied, your total itemized deductions are less than your standard deduction, which is why the software uses the standard deduction and your refund doesn't change.