Adding things to your profile after deadline?

I applied to a bunch of Jan 15 schools, but recently, I got something pretty big that I felt should be added to my application. How should I go about letting the schools know that I did so, in order for it to get added to my file?

We had a similar circumstance and just emailed the AOs and asked it to be added to his file.

We had some honors and “wins” to add after Jan 15th - relevant to athletics - MVP, county awards, competitions won, rankings, and stats on MaxPreps…we sent updates to coaches and AO.