>> T18 file

T18 file format description

Many people share .t18 files without attaching instructions on how to use it. Yet it isn’t evident for everyone which program a .t18 file can be edited, converted or printed with. On this page, we try to provide assistance for handling .t18 files.

1 filename extension(s) found in our database.

.t18 - H&R Block 2018 Tax Return Data

The T18 data files are related to H&R Block 2018. T17 file is a H&R Block 2018 Tax Return Data. H&R Block 2018 is a tax software developed by HRB Digital.

H&R Block 2018
Data files
- / -
H&R Block 2018 Tax Return Data related extensions:
Rohitab API Monitor x64 Capture Data
TI-92 Calculator Assembly Program
TI-92 Calculator Lab Report Data
At Home Canada 2017 Tax Return Data
Programmer's Notepad Data
PLINK Genomic Distance Proportion Matrix Data

Naturally, other applications may also use the .t18 file extension. Even harmful programs can create .t18 files. Be especially cautious with .t18 files coming from an unknown source!

Can't open a .t18 file?

When you double-click a file to open it, Windows examines the filename extension. If Windows recognizes the filename extension, it opens the file in the program that is associated with that filename extension. When Windows does not recognize a filename extension, you receive the following message:

Windows can't open this file:


To open this file, Windows needs to know what program you want to use to open it. Windows can go online to look it up automatically, or you can manually select one from a list of programs that are installed on your computer.

To avoid this error, you need to set the file association correctly.

The .t18 file extension is often given incorrectly!

According to the searches on our site, these misspellings were the most common in the past year:

g18, t1, t81, tq8

Is it possible that the filename extension is misspelled?

Similar file extensions in our database:

Recomposer MIDI Sequence
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TQSL Signed Certificate Data
EightyOne ROM Image

Operating systems currently supports the following operating systems:

Windows XP/Vista, Windows 7/8, Windows 10, CentOS, Debian GNU/Linux, Ubuntu Linux, FreeBSD, Mac OS X, iOS, Android

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