I went back and rechecked line 18 on 1116 AMT and the automatic calculation was not correct. So I went to the data source for line 18 and here is what it says:
Part III, line 18:
If this category of income is lump-sum distribution (box e), from smart worksheet, line C.
If tax is calculated not using the Schedule D Tax Worksheet or the Qualified Dividends and Capital Gain Tax Worksheet or Form 6251, line 17 is not more than $191,100 ($95,550 if married filing separately) and the Adjustment Exception applies, from Form 6251, line 4.
If tax is computed using the Schedule D Tax Worksheet or the Qualified Dividends and Capital Gain Tax Worksheet and the Adjustment Exception does NOT apply, from Form 6251, line 4 LESS the following amounts from Form 6251:
- line 36 multiplied by .1071
- line 33 multiplied by .2857
- line 30 multiplied by .4643
- line 23
End
The amount Turbotax used was based on the second paragraph. In my situation, the calculation should be based on the last part. You are correct, the amount is different from normal 1116.
