All tax changes have to go through Congress, but in the long run Trump wants to make taxes lower on the individual. If he can get companies to ramp up production inside the US the over all tax income will go up. But by cutting taxes on the individual Trump hopes to increase spending thus kick starting the economy.
My concern is where is Congress going to slip increases in on the citizens. Excise taxes are already on things we have to pay for: fuel, airline travel, ammo, arrows and bows, vaccines, insurance..... Look up the Form 720. Is Congress going to add more or raise the ones they already have out there. They are too addicted to having all that cash flowing into pet projects.
I expect Trump to step down near the end of his term once everyone is comfortable with Vance and all the changes. The long term will be up to Laura and Barn keeping the Dems from cheating their way into control.