I also want to know about how to provide feedback. Isn't there a way to email or provide comments online without having to call or write a letter in the USPS mail?
My only point was to offer a suggestion/comment. The State tax returns often require a copy of the Federal return to be submitted with the state return. If mailing the state return (USPS) the TurboTax state "file by mail" instructions (Wisconsin) do not explain that. I only know this because of previous years.
