Thank you and yes, your understanding is spot on. My issue seems to be a technical one as the site will not allow me to make the changes you suggested.
When I click 'Edit', I am taken to 'Your HSA Summary' page where it lists the additional deduction. I click 'Edit' on that page and it takes me to the 'Tell us about your health-related accounts...' page. I proceed through the steps, yet I am never brought back to the section where I previously entered the additional personal contributions. I even tried to get there a different way under tax breaks>Medical>Show More>Revisit but I end up on the same route as above.
Is there a way to reset this section?