You're asking "how" to something nobody claimed. The dude with the Tommy Wiseau av said "he has no platform or policy", which was the silly thing dems were told to say several months ago not expecting an answer, and it only lasted about a week because they did get answers, and
@lilelvis posted the website for a list.
For some reason you picked a few random ones and asked how they relate to something else that nobody said, but to answer the benefits of the ones you picked out, tax relief is obviously for people to keep more of their own money and for companies to not have tax increases that they pass on to consumers, nobody is "deporting millions of immigrants", the deportations would be illegal invaders and the ones who aren't rapists, gang members and drug smugglers can then apply to come back and become immigrants, and increasing tariffs would be to make outsourced production more expensive than hiring and buying domestically.