QuickBooks Error 16026is a critical error that usually happens due to the damaged data files. If you have accidentally deleted or corrupted the company files; this problem might arise on your device as well. Some common causes are:

• It can happen due to an internet connection problem.

• This issue can also be caused due to the unsupported version of Quickbooks software.

• When the Quickbooks files are not downloaded or installed properly.

• If you're still using an outdated version of Quickbooks or Internet Explorer. 

Any of these problems can lead to this error and more. you can read my new blog :-