Hello there, @kennaas.
There will be no problem in upgrading your QuickBooks Desktop 2012 to 2019 version. I'd be glad to walk you through the steps on how to upgrade.
First off, we'll need to create a backup file to make sure that the data will be saved before upgrading. To get started, let's perform the following steps to back up your company file:
- Go to the File menu, choose Back Up Company, then select Create Local Backup.
- Select Local Backup.
- Click Options.
- In the Tell us where to save your backup copies field, select Browse and select the location in which to save the backup copy.
- Hit OK.
- In the Create Backup window, specify whether to back up automatically, and select Options to set options for automatic backups.
- Select New to set a backup schedule in the Schedule Backups dialog.
- Click Finish.
I've got you an article for your reference: Create a Backup of your Company File.
Once done, you can now upgrade your QuickBooks Desktop 2012 to 2019 version. For your reference, you can check out this article for the detailed steps and information: Upgrade to a New QuickBooks Desktop Version.
In case you need tips and related articles in the future, visit our QuickBooks Community help website for reference: QBDT Self-help.
Feel free to go back to this thread if you have more questions. The Community team is here to help you move forward.
