There is a way to force Turbo tax include specific form. Go to forms view, select the form you want to include in the efile, e.g., form 6251. Scroll all the way to the end, and check the box "include form in return even if it is not required". And it is a VERY GOOD idea to include 6251, I've heard stories that people receive IRS request later to include form 6251 even though they do not owe any AMT. This is a bug that I wish Turbotax can fix, instead of relying on informed users.
