I am part of middle class. We expect to get a couple hundred dollars back more relative to previious years. Will not keep pace with cost of living increases.Tax laws changed this year...most "regular" people should benefit from the changes.
I skimmed this article and from what I see it looks pretty accurate:
https://www.fool.com/taxes/2017/12/29/your-complete-guide-to-the-2018-tax-changes.aspx