To change an answer, please follow the below instructions to go back to the section needed:

https://ttlc.intuit.com/community/after-you-file/discussion/how-do-i-change-an-answer/00/117947

The question was do I  pay for half of my expenses. I answered no ,I should have answered yes

Have you already filed? If not, you can revisit the My info section to change your answer. Otherwise, you may need to amend if you have already filed.

Here's an article with instructions on how to amend a return. 

How do I amend my 2019 TurboTax Online return? - Community