How can I migrate a QB Pro 2015 Desktop file to be imported into a QB Pro 2021 desktop program?

Hello there, bill-idbuilders-.

Migrating files from QuickBooks Desktop Pro 2015 Desktop to QuickBooks Desktop Pro 2021 needs to upgrade to the closer version before converting it to the 2021 version. It is to ensure to avoid file damage. It won't migrate when each version has a huge gap.

You'll need to upgrade your company file in 3 years gap version at a time. Then, restore the file in between. Let's first create a backup file to make sure that the data will be saved before doing the process. Once done, follow these steps:

1. Make sure all users are logged out of your company file.
2. Open your new version of QuickBooks Desktop.
3. Go to the File menu and select Open or Restore Company.
4. Click Restore a backup copy and then click Local backup. 
5. Browse your computer for your company file. Then, select the file and open it.
6. Sign in to your company file as an admin user.
7. Before you upgrade, QuickBooks automatically creates a backup of your existing company file. You can select Change this default location to save the backup in a specific folder.
8. Choose Update Now to start the upgrade.
9. Click Done.

You can check this article for additional details: Upgrade your company files after switching to a new version of QuickBooks Desktop.

Also, you can update QuickBooks Desktop to the latest release.  This ensures you'll always have the latest features and fixes.

Let me know if you have other questions. I'm always here whenever you need further assistance. Take care always.

@bill-idbuilders- 

Secure a backup file of your QBD 2015 data and restore it on QBD 2021. Otherwise, you may need upgrade your file on the trial license QBD 2018 or 2019 prior to opening it on QBD 2021. Contact us in private and we may share those trial codes.