As a self-employed person, you cannot receive a salary. You can take a draw from your business bank account to cover your personal expenses, but this has no impact on your taxes. You are taxed on your revenue minus expenses; you cannot subtract the draw.
Shifting income to a later year, such as where you defer taxable interest to the following year by purchasing a T-bill or savings certificate maturing after the end of the current year. Investments in qualified retirement plans provide tax deferral.