Extension

File Type

Description

.IIF

Intuit Interchange Format file

You can import and export lists and/or transactions using text files
with an .IIF extension.

.ND

QuickBooks Network Data File

A configuration file that allows access to the QuickBooks company
file. Do not delete this configuration file.

.QBA

Accountant’s Copy working file

When you export your QuickBooks data for your accountant to review,
the accountant restores the export file on his or her computer as a file with
a .QBA extension.

.QBA.TLG

Transaction log file

(for Accountant’s Copy)

When you backup an Accountant’s Copy, QuickBooks starts a log of
transactions that you’ve entered since the last time you backed up. In case
of accidental loss of data, Quicken Technical Support can use your most
recent backup in conjunction with the transaction log file to recover your
data.

.QBB

QuickBooks backup file

When you backup your company file, QuickBooks save the backup file
with a .QBB extension. To open a .QBB file, go to the File menu and click
Restore.

.QBM

QuickBooks portable company file

When you want to email or move a company file, QuickBooks creates a
compressed version of the company file with a .QBM extension.

.QBW

QuickBooks for window company file

When you create a company file, QuickBooks saves the file with a .QBW
extension. For example, If you enter MyBusiness as the company name,
QuickBooks save the file as MyBusiness.QBW

QBW.TLG

Transaction log file

(for QuickBooks company file)

When you backup your company file, QuickBooks starts a log of
transactions that you’ve entered since the last time you backed up. In case
of accidental loss of data, Quicken Technical Support can use your most
recent backup in conjunction with the transaction log file to recover your
data.

.QBX

Accountant’s Copy

(export file)

When you export your QuickBooks data for your accountant to review,
QuickBooks creates an Accountant’s Copy with a .QBX extension.

.QBY

Accountant’s Copy

(import file)

When your accountant has finished making changes in a Accountant’s
Copy, he or she provides you with an .QBY file to be imported into your
company file.