It may be possible that *.1pe files can be imported to TurboTax accounting software and exported / printed as PDF documents for sharing purposes. Probably done through dedicated PDF export function. Once saved as *.pdf documents, these cannot be typically imported back to accounting programs.
Convert TurboTax tax forms file to Adobe Portable document format.
We found 2 software records in the database related to .1pe to .pdf file format conversion.
Microsoft Windows software - convert 1pe to pdf on Windows
A tax preparation software developed by Intuit
Convert from 1pe file format
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned 1pe to pdf. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Apple macOS / Mac OS X software - convert 1pe to pdf on OS X
Popular tax preparation software