Since you are taking the standard deduction, entering medical expenses is unnecessary. As Expert TeresaM has found, deleting your forms is your best option.
From TeresaM:
It sounds as if this particular worksheet has hung in the Review stage. Since you would need substantial medical expenses to exceed 7.5% of your adjusted gross income to add to itemized deductions and it sounds like you are taking the standard deduction, it will be best to delete this worksheet.
To delete the form, you can use Delete Forms
In the left menu, select Tax Tools
Select Tools
Select Delete a form
Scroll to the Medical Expense Worksheet (below Schedule A) and click Delete on the right
Then scroll to the bottom and select Continue with my return