This article describes how to set a PDF in legal size, landscape or portrait orientation.
The orientation must be set before the document is saved. Select the desired orientation in the printer options for the printer you are using in the QuickBooks Printer Setup for Reports.
Note: There is an orientation setting in the QuickBooks Printer setup window but it does not change the orientation when saving the PDF document. Only the setting in the printer properties has the desired effect on the orientation.
To create a legal size PDF in QuickBooks Desktop