faq
Frequently asked questions
General
What is QuickBooks.ninja?
A free resource site providing tips, error solutions, and how-to guides for QuickBooks Desktop users.
Is everything on this site free?
Yes. All tips, guides, and error code references are completely free to read and use.
Technical
What versions do your tips cover?
All versions of QuickBooks Desktop -- Pro, Premier, and Enterprise editions from every year. We also cover QuickBooks for Mac and QuickBooks Online where relevant.
Should I run Verify and Rebuild on a corrupted file?
No. Running Rebuild on a damaged file can cause further data loss and make recovery more difficult. Our tips explain safer alternatives.
What are C= errors?
C= errors indicate internal data corruption within your QuickBooks file. They are typically more serious than -6000 series errors and often require professional repair. See the Error Codes page for the full list.
Which file types does QuickBooks use?
QuickBooks Desktop uses .QBW (working files), .QBB (backups), .QBM (portable files), .QBA/.QBX (accountant copies), and .TLG (transaction logs). See our File Extensions tip for details.