The h12 file extension is used by the At Home tax software. H12 files store tax return data for year 2012 in Canada. To open an h12 file, use compatible programs like TurboTax or At Home.
If the H12...
The h12 file extension is used by the At Home tax software. H12 files store tax return data for year 2012 in Canada. To open an h12 file, use compatible programs like TurboTax or At Home.
If the H12 file does not open in TurboTax, create a file association. Right-click the file, select Properties, and use the Change button to associate the file with TurboTax. Check the “Always use…” box to make the association permanent.
Update TurboTax to the latest version if needed. On some systems, antivirus software may block access to H12 files. If so, allow access or remove the file and scan for viruses. The system should automatically associate H12 files with the correct software. If not, manually select the software to open H12 files.
H&R Block Tax Software