Inverse income tax functions

inverse_income(tax, fy.year = "2012-13", zero.tax.income = c("maximum",
  "zero", "uniform", numeric(1)), ...)

Arguments

tax	The tax payable.
fy.year	The relevant financial year.
zero.tax.income	A character vector, ("maximum", "zero", "uniform", numeric(1)) Given that many incomes map to zero taxes, the `income_tax` function is not invertible there. As a consequence, the inverse function's value must be specified for tax = 0. "maximum" returns the maximum integer income one can have with a zero tax liability; "zero" returns zero for any tax of zero; "uniform" provides a random integer from zero to the maximum income with a zero tax. The value can also be specified explicitly.
...	Other arguments passed to `income_tax`. If `tax` or `fy.year` are vectors, these should be named vectors.

The approximate taxable income given the tax payable for the financial year. See Details.

This function has an error of $2.