Taxpayer received a CP11 requesting more tax to be paid. It says Taxpayer
> should have calculated tax using Schedule D Tax Worksheet or Qualified
> Dividends and Capital Gain Tax Worksheet. Taxpayer did, and redid.
> Taxpayer cannot figure out how the IRS arrived at its tax calculation. Any
> thoughts?
never mind. Taxpayer was subject to the AMT, and didn't fill out that form correctly. Apparently the IRS did, but was keeping it a secret.