ACT +writing on common app

I have already taken the ACT without writing and am taking +writing this December. The school I am applying to requires writing for admission. If I want to send out my common app before I take the exam w/ writing, how should I record that on the application? Will the school even look at the application before they receive my plus writing score?

Put a note in your “Additional Information” section that say you will be retaking it.