Your confusion is probably genetic or mentally induced so let my try to help you out.
With the new Tax Cuts for the MegaRich Bill many people will indeed see very slightly smaller tax bills for a short period of time. Those reduced tax bills will come with costs that will more than take back what is saved. Medicare, Social Security, Medicaid PAYGO cuts will more than eat up the savings and the alterations to ACA Mandate will raise health insurance premiums by 10% or possibly more.
I suspect that you knew this and you're love of The Gropenfuhrer won't let you admit it but if you sincerely did not understand these things then please see your doctor at once. You would be a great candidate for some heavy opiods