What is the TT18 file format?
A file with the .TT18 extension is a file known as TurboTax 2018 tax return. It belongs to the Database Files category.
The reliable way to open a .TT18 file is with software that recognises this exact format, rather than guessing from the file name. If you are not sure what created a file, our file identifier can read its first bytes and name the real format, even when the file has been renamed.
This page lists 2 programs that open .TT18 files. A fully verified, hand-written description of this format is being prepared; until then, the details on this page are drawn directly from our database.
Format details
in a nutshellPrograms that open TT18 files
Windows1 app
Mac OS1 app
Community Q&A
asked by usersNo questions yet - be the first to ask about TT18 files.
