https://accountants.intuit.com/support/en-us/help-article/multi-state-taxes/entering-multi-state-amo...

https://accountants.intuit.com/support/en-us/help-article/partnership/multi-state-returns-partnershi...

I am assuming you are doing a 1065 with a resident state (not OR) and some OR income. In the profile you would set up the two states. In the Client Information you indicate Multi State 

In the income input there should be a + that will show columns to split the income by state