How do I access Schedule OI?

If you file Form 1040-NR, use Schedule OI (Form 1040-NR) to provide additional information not directly entered on Form 1040-NR including whether you are claiming a benefit under a tax treaty. To access Schedule OI in Tax Processors Plus Desktop, from the main menu of Form 1040-NR select;

• Personal Information
• Other Categories
• 1040NR Other Information

Additional Information: 

Form 1040-NR - U.S. Nonresident Alien Income Tax Return

IRS: Instructions for Schedule OI in Form 1040-NR