T18 File

A file with the .T18 extension is a file known as H&R Block 2018 tax return. It belongs to the Database Files category.

The reliable way to open a .T18 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 .T18 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.