This is controled by the OS, whichever is your default there is also your default from QB.

Windows: To select a default printer
  • Open Devices and Printers by clicking the Start button , and then, on the Start menu, clicking Devices and Printers.
  • Right-click the printer you want to […]

Resolution for 'Change Default Printer issue: 'How do I change the default printer when printing checks?' available: Yes.

The Change Default Printer issue or error code is a known issue in Quickbooks Online (QBO) and/or Quickbooks. Support for this issue is available either by self-service or paid support options. Experts are available to resolve your Quickbooks issue to ensure minimal downtime and continue running your business. First try to resolve the Change Default Printer issue yourself by looking for a resolution described in the article. If it is a complex Change Default Printer issue or you are unable to solve the issue, you may contact us by clicking here or by using other Change Default Printer support options.

For more information about resolving issues related to Change Default Printer in Quickbooks/QBO or to get support for the issue 'How do I change the default printer when printing checks?', click the link below: