How do i determine if my parents paid more than half my expenses

Like what counts as an expense? And if i have multiple siblings, does the rent per month for the house i live in, is it split among all of us as a personal expense towards each, or does the entire rent bill count towards me?

Get your taxes done using TurboTax

There is a very good worksheet to help you determine how much support your parents provide. It is on page 16 of IRS Pub. 501
https://www.irs.gov/pub/irs-pdf/p501.pdf