IRS Form 8594 is not included in any of the TurboTax personal income tax products, including TurboTax Premier.
Form 8594 is included in TurboTax Business which creates tax returns for SCorps, C Corporations, Partnerships and multimember LLCs.
Here is an IRS link to a PDF file of Form 8594.
PDF 8594 Form: https://www.irs.gov/pub/irs-pdf/f8594.pdf
Instructions 8594 Form: https://www.irs.gov/pub/irs-pdf/i8594.pdf
