How do I include documents when I efile with turbotax software?

[michaels8412-gma]

I need to include an election form that is not listed in the turbotax premier software.

[DoninGA]

Documents cannot be attached to an e-filed tax return.  If you need to add a document that is not supported by TurboTax you will have to print and mail the tax return.

[ee-ea]

If the form is not listed on Form 8453 the whole  return goes in by mail.

https://www.irs.gov/pub/irs-pdf/f8453.pdf