Dont know where to look to find the Origin code to download the Seasons costumes???

You should have gotten an email with a code to register.

If not check your purchase History: https://store.thesims3.com/purchaseHistory.html

yes I did, I finally figured it out. I finally came across the right place to enter in the code in the email. Thanks!

Great to hear.

Could you please accept a solution so people know that this is sovled and what the solution was.

Thank you