If you are using a desktop (installed on a computer) version of TurboTax, you can use Forms Mode. Note that some entries may require overrides which voids the TurboTax Accuracy Guarantee (also obviates the ability to e-file, but you cannot e-file, anyway).
You still need to manually write the annotation, as directed by the IRS, since there is no way to do that in TurboTax.
