You can start most effectively by refusing to voluntarily submit your information to the IRS, which has no claim upon your private information nor your funds. To be effective, you must have a ready understanding of the actual state of taxation in this country through your own research, and be able to describe it in and out of court in correction of what "everybody knows" taxes to be. In the case of taxes and U.S. politics, what "everybody knows" is not accurate in the slightest, and this can be confirmed through your own research. Should you not succeed in court, you will still be able to convince a fair court that you had due diligence and your best efforts gave you no malicious intent to break the law. (Your difficulty at that point would be to find a fair court in a country where the majority of citizens have no desire to research the actual law, and who therefore don't enforce their government's accountability to it.)
A great wealth of relevant case cites regarding "income" taxes may be found here:
For more information on how the IRS/BATF were created offshore because they wouldn't be lawful here, then moved into the Union through a bit of restructuring, see here:
You ought to be able to save anywhere from a third to one half of what you earn.