All tax preparation and accounting software support the export (or printing) to PDF document. So it should be no problem to save old TAX2008 files as PDF documents. This of course creates only static document for printing, no further editing is allowed.
Convert TurboTax 2008 tax return file to Adobe Portable document format.
We found 3 software records in the database related to .tax2008 to .pdf file format conversion.
Microsoft Windows software - convert tax2008 to pdf on Windows
A popular tax preparation software from HRB Digital
Convert from tax2008 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 tax2008 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.
A tax preparation software developed by Intuit
Apple macOS / Mac OS X software - convert tax2008 to pdf on OS X
Popular tax preparation software