No, the IRS does not inform Oregon about changes to your federal return. Federal and state returns are processed by completely separate entities. If you need to change something on your state return you will need to send in an amended state return.
To amend only a state return:
https://ttlc.intuit.com/questions/2824532-i-need-to-amend-my-state-return
https://ttlc.intuit.com/questions/3827521-can-i-efile-an-amended-state-return
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
