A daily updated filename extension database!

H12 file extension

The table below provides useful information about the .h12 file extension. It answers questions such as:

  • What is the .h12 file?
  • What program do I need to open a .h12 file?
  • How can the .h12 file be opened, edited or printed?
  • How can I convert .h12 files to another format?

Table of Contents

We hope you find this page helpful and a valuable resource!

1 extension(s) and 0 alias(es) found in database

✅ At Home Canada 2012 Tax Return Data

At Home Canada 2012 Tax Return Data .h12 file icon
H12 file is an At Home Canada 2012 Tax Return Data. H&R Block At Home is a tax preparation program offered by H&R Block.
H12 format description not yet available
Category: Data files
Application: At Home Canada 2012
Mime-type: application/octet-stream
Magic number: -
Magic string: -
Sample: -
H12 aliases:
H12 related links:
H12 related extensions:
At Home Canada 2010 Tax Return Data

At Home Canada 2011 Tax Return Data

At Home Canada 2013 Tax Return Data

At Home Canada 2014 Tax Return Data

At Home Canada 2015 Tax Return Data

At Home Canada 2017 Tax Return Data

At Home Canada 2016 Tax Return Data

Other types of files may also use the .h12 file extension.

🚫 The .h12 file extension is often given incorrectly!

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

g12, h1q, h1w, h2, hl2, m12, t12, u12

Is it possible that the filename extension is misspelled?

We found the following similar file extensions in our database:

Schiller Medilog 12ch ECG Raw Data
Microsoft Help Merged Query Index
At Home 2012 Tax Return Data
Microsoft Help Merged Keyword Index
UFile 2012 Tax Return Data
H2 Database File
CAMtastic Mid Layer Gerber Data
Half-Life 2 Saved Game
Microsoft Money 2004 Backup Data

🔴 Can't open a .h12 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 cannot open this file:


To open this file, Windows needs to know what program you want to use to open it...

If you don't know how to set the .h12 file association, check the FAQ.

🔴 Can I change the extension of files?

Changing the filename extension of a file is not a good idea. When you change a file's extension, you change the way programs on your computer read the file. The problem is, changing the file extension does not change the file format.

If you have helpful information about the .h12 file extension, write to us!

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