Donations can only deduct 30% of taxable income. Scheme 1 can only deduct 1.050 yuan from the donation of 2,000 yuan, scheme 2 can only deduct1.050 200 yuan, and scheme 3 can fully deduct 2,000 yuan (each deduction 1.000 yuan), so scheme 3 is the best.
In fact, Scheme 3 is not the best scheme either. The best scheme is to take out 1.200 yuan for labor remuneration income and 800 yuan for wage income. This scheme pays the least personal income tax. You might as well calculate it.