TurboTax does ask for statements when the IRS requires a statement.
Even an mailed return is entered into the electronic system by data entry clerks. Attached statements are just ignored since there is no place to enter them. They will be filed away with the paper return and nobody will ever see them.
**Disclaimer: This post is for discussion purposes only and is NOT tax advice. The author takes no responsibility for the accuracy of any information in this post.**
