Does Harvard require applicants to send official score reports?

I'm trying to get all my materials ready for my Harvard application, and I can't figure out exactly what they're looking for when it comes to SAT or ACT scores.

Is it possible to self-report my test scores on the Common App or their portal, or do they actually require us to send official score reports directly from College Board or ACT before they will review our application? I'm asking because the fees add up, and I'm also worried about any delays.

If anyone has applied recently, can you share your experience? Did you self-report first and then send official scores later if you were admitted? Or did you send official ones with your initial application? Just trying to get all these details right.