they really don't get too mad. I do it by hand, sometimes using a calculator, and they just send you a correction. mostly its been in my favor. California taxes

they really don't get too mad. I do it by hand, sometimes using a calculator, and they just send you a correction. mostly its been in my favor. California taxes are based off of federal, so CA used to get kind of pissy because eventually they would find out about the correction somehow. last year they send me a notice within a couple days of the IRS