Below are helpful steps and video that'll surely guide you on how to install QuickBooks Desktop.
Your data from an earlier version of QuickBooks will update automatically the first time you open the company file in a new version of QuickBooks. Before doing so, QuickBooks automatically backs up the company file in its current version format so you can revert back to the previous version of QuickBooks if you need to.
QuickBooks company files cannot be merged or combined.
Default QuickBooks company file location: C:\Users\Public\Documents\Intuit\QuickBooks\Company Files
However, company files can be manually saved anywhere on your hard drive. See Display hidden files and folders or search for files using Windows for detailed information.
If you have been using Attached Documents, ensure that the attach folder and your company file are in the same location prior to upgrading your company file to the new version of QuickBooks. If the attach folder is not in the same location as your company file, the links within your company file will be broken and you will need to re-attach any documents you previously used.
This article is part of our content on Setting up QuickBooks Desktop.
Are you using the US version of QuickBooks for Mac? See Install and set up QuickBooks Desktop for Mac.
We also have more information available if you are looking to install multiple QuickBooks Desktop versions on one computer.