At Home accounting program probably has a dedicated PDF document export function, so it can export it's tax forms (like *.t11) to PDF format. Used for previewing and sharing.
Convert At Home 2011 tax return data to Adobe Portable document format.
We have found 2 software records in our database eligible for .t11 to .pdf file format conversion.
Microsoft Windows software - convert t11 to pdf on Windows
A popular tax preparation software from HRB Digital
Convert from t11 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 t11 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 t11 to pdf on OS X
A complete a simple federal tax return software