Biggest tax refund

[sparr]

Due to a combination of unemployment, pandemic stimulus, stock income, prediction market income, marriage, going back to school, and other factors, I overpaid my taxes in 2020 by more than every year from 2000 to 2019 combined. In the past I've tried to keep my overpayment, and thus my refund, as low as possible, with $4 being my best year and most years being well under $1000. This year I overpaid by more than 10% of my income.