I have a similar curiosity re: what you're asking Michael. I was wondering if it is required that you have to pay estimated taxes yourself to the IRS & your State quarterly and if so, how these amounts are determined. I thought it was optional to pay estimated taxes, but I was told that if you don't pay the estimated taxes, you would have to pay an underpayment penalty at the time you file your return in addition to the taxes due. I'd appreciate some feedback regarding this subject! Thanks for your question Michael!
