If you own an LLC you can pay yourself a salary (needs to be fair market) and then some of your money is W2 and some is corporate side. The corporate is tax at a lower rate than your personal income tax, And then both piles of money have moved into lower tax brackets.
Then common expenses for doing business like mileage become deductible when they are just a commute as a W-2.
You can setup your own simple
IRA and And since you own the company you can choose to have a retirement matching. Now you have a second retirement account and tax deferment over your normal job.
And then at the end of all of this, there are reduced tax cash distributions you can take from the company.
The entirety of tax system works for people who own companies and real estate. I never knew this until I started making some decent money and then went to a CPA and was flabbergasted at the system.
The average Joe does not get to participate.
You can't do any of this on your phone.
@Kneeblock
The best thing you could ever do as a professor, a skill that easily lends itself to online lectures and books and other distributable items, is start a side business doing what you love...simultaneously giving you access to this bizzaro world of tax rules.