QuickBooks Error 40001 is a data-related error that suggests the company data (the "company file" in QuickBooks parlance) may be corrupted. The QuickBooks validate and rebuild the data utility may be used to attempt a speedy recovery from this problem. Now let me show you how.

1. First, open QuickBooks Desktop and select the Verify Data tool from the Utilities submenu of the File menu.

2. When the tool detects corruption, you can fix it by selecting the Rebuild data option.

3. Third, try running QuickBooks again after repairing the company data to see if the error has been fixed.

If not, call QuickBooks data services support at +1 888-704-1357 for assistance if you continue to receive the QuickBooks problem 40001.

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