Если знаете букву, на которую начинается нужное расширение - выберите ее.

.T11 расширение

Расширение формат файла «.t11»
Тип файла At Home 2011 Tax Return
Разработчик H&R Block
Категория Файлы данных

Описание формата файла

Tax return created with H&R Block At Home 2011, a tax preparation program designed for home use; contains U.S tax forms and tax data for the 2011 tax year; may also include data for an individual state return; can be printed and mailed or filed electronically when completed.

At Home 2011 is developed and distributed by H&R Block, a professional tax preparation company. The software is available in Basic, Deluxe, Premium, and Premium & Business editions.

NOTE: At Home 2011 saves tax returns with a ".t11" file extension, but can also import data from At Home 2010 (.T10) files.

Программы, которыми можно открыть файл .T11