Deductions & credits

I'm sorry for asking on this thread, but I can't figure out where to post a question.

When filling out my medical deductions, I added the total deductions and it came to $18,760. but when I go to the Turbo tax page which shows the medical deductions, it shows $39,035. I put TT explanation on how this is calculated below, but it seems like it is a  lot and I don't want to get audited.

Thank you for your help

Medical Expense Deduction
 

 
 
How did you calculate my $39035 of total medical expenses?
 
Your $39035 of total medical expenses comes from adding up your $ of prescription medication, your $ of medical insurance premiums, your $ of Medicare premiums, your $ of eye care expenses, your $ of x-ray and lab work fees, your $ of medical professional fees, your $ of medical equipment and supplies expenses, and your $18792 of net premiums from 1095-A after adjustments.
How did you calculate my $18792 of net premiums from 1095-A after adjustments?