For others searching for this, it looks like one of my replies was censored, likely for mentioning competing tax software.
To summarize, TurboTax's main competitor does support attaching forms when filing electronically. Unfortunately, neither TurboTax nor its main competitor support filling in the information for Form 8832 or 8858. At least with the other tax software it's possible to workaround without printing and filing a paper return.
The other tax software is inferior to TurboTax, so I'm stuck choosing from a 200 page paper return with TurboTax or having to manually input dozens of 1099-B that fail to import in the other tax software.
Dear TurboTax Product Managers, please properly support the 9 million or so U.S. expats properly. Thank you.
