In May I finished a tax return for a minor child that had substantial investment income due to her grantor type special needs trust.  I just got the e-file signature form back from the parents and when I went to e-file the return I noticed the tax decreased.  Everything was the same except the tax calculations on Form 8615, line 9 of the parent's tax calculation.  Apparently I didn't catch that the form was miscalculating the tax and ProSeries must have recently updated the program to fix this.  I am very frustrated and angry with ProSeries!  First, we rely on their tax software to correctly calculate tax due after we have correctly prepared the tax return.  Second, why no notice of this error and update?  Had I known the software was not calculating the tax correctly I would have manually calculated it.  I got no alerts and have searched everywhere and see no explanation.  I am so sick of ProSeries this year.  Anyone have a better software recommendation?