I also seem to owe a lot of taxes by the end of the year. I also have an irregular income, which changes twice yearly based on the number of classes I'm assigned each semester. I used the IRS tax calculator, but it said that the amount being taken out for taxes was fine. I made a guess as to how much I should take out with better results, but I'd really like to find a more equitable way to figure out my adjustments especially given my constantly changing income.
Thanks.
