understand quickbooks tlg file transaction log

Understand QuickBooks tlg File Transaction Log The QuickBooks transaction log file keeps track of all modifications to the company file (.qbw) that are about to be made before they are recorded in the business file.

The .TLG in QuickBooks stands for the transaction log. It is used to fix the corrupted data. The .TLG file contains a copy of all the transactions in the company file in the form of a backup. The auto-recovery tool or other Intuit data services use this type of file for the purpose of recovering a file. The below article is rounded up with the troubleshooting guide of the QuickBooks tlg file.

What is a Transaction log file?

The .TLG log contains all the modifications to the company file before writing the file through the database manager. The transaction log file appears in the same folder named QuickBooks company file. If you copy the QBW file to another folder then moves the .TLG file with it. If your data file loses connection to this file, then QB will automatically make a new one. If you require restoring an old backup of the company file, then use QuickBooks automatic data recovery.

When Did you Need to Reset the .TLG file?

  • If you restore the portable company file named .QBM
  • You create a local backup of the data file and then choose to complete the verification procedure in the backup options window. There is no requirement for the transaction log to store already recorded transactions in the file. 
  • Your company data file is not compatible with the .TLG file. If you try restoring the backup in the same folder with the same name of the original .QBW file.
  • If a .QBW file is set up to sync via sync manager then .TLG is unable to reset during a complete backup with verification.

Read More: How to Backup QuickBooks Desktop to Flash Drive?

What is the TLG file Comprised of?

TLG (Transaction log file) is a QuickBooks file type that is created when you open the company file on another device. This file consists of copies of .QBW files are mainly used in data restore objectives. Once transactions get updated in the QuickBooks company file, the modifications are stored in the Transaction log file. Hence this file will assist you in the future to track TLG changes. These files fastly grow, which in turn increases the QBW file and decreases the performance. The expanded size has direct impacts on the backup programs, procedures, and performances.

TLG file is made up of an ND file type determined as the NetConnect file containing the data regarding company files’ multi-user access. This file should not be erased.

What is the Procedure of Restoring a TLG File?

If you have mistakenly deleted the QuickBooks company data file or import file then use the .TLG file to recover it. This file must be valid to replay the data of the TLG file into another file backup. In this case, the TLG recovery service is widely used. Follow the below methods to recover the file using the QuickBooks TLG recovery service.

  • Replay the information into an Older Backup file
  • Copy the company file contents to recover the incorrect data.


This blog discusses the QuickBooks tlg File and its related terminologies. Hopefully, the information is helpful! If you face any issue or need to solve a query that you are unable to fix yourself then get connected to QB professional team. They will always provide you better guidance and save valuable time.

Didn’t find the solution to TLG file error. Go through our list of solutions for common errors in QuickBooks Desktop.

Frequently Asked Questions

  1. When did the TLG file is created?

    Whenever the company files are opened in a different location. All transactions of the company file are copied in the TTG file and the main file with QBW is used for recovering corrupted files.

  2. What benefits do I get with TLG file?

    1. It assists in monitoring the data modifications in the recently created backup
    2. The TLG file is beneficial to restore data in the external failures such as corruption, program crashes, or connection conflicts
    3. The file must be stored in the same directory with QBW files
    4. If you accidentally miss any essential file in the QuickBooks Company file then you can process the data recovery file into an earlier backup.
    5. When you complete a manual backup procedure in QuickBooks, the TLG is reset. If QuickBooks loses the internet connection to the data file then the Transaction log file automatically recovers the company data file. This procedure is highly suggested when your file are not fixable because of corrupted data.

  3. Why do I get the TLG file error?

    1. Corrupted QBWUSER.INI file
    2. Damaged program files
    3. The company file name is lengthy
    4. QBW file location complexity
    5. Damaged QuickBooks data and Windows Operating system
    6. Incompatible QuickBooks

  4. Can I delete QuickBooks tlg file?

    A transaction log file (TLG) keeps track of changes to the file since the last backup. TLG files that are too large can cause performance issues. Do not remove TLG files. Whenever you restore a portable company file, QuickBooks Desktop will re-index the data.

  5. What is a Tlg file in quickbooks

    The tlg file is a transaction file used by QB inbewteen backups. You might try restoring the back up file. then copy the tlg file to the directory and then open the data file in QB. If things work well it should load the company file and then the tlg file.

  6. Can I Delete the QuickBooks TLG file?

    Large TLG files can cause performance issues. Do not delete the TLG file. Instead, make a manual backup with full verification to reset the TLG. Since QuickBooks Desktop re-indexes the data when it restores a portable company file, create and restore a portable company file instead.

  7. What are TLG files?

    TLG file is the Sybase transaction log file, it records all of the database server’s activities related to your Company file, including all reads, writes, edits, inserts and deletes.

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