Box Tops are changing. Many products will require you to scan your receipt instead of clipping the coupon off of the product. Here is more information. 
https://www.boxtops4education.com/sneakpeek

Below is some information from the Box Tops website.

How will the new program work?

At its core, the program structure and purpose remain the same – to help schools get what they need.  The main difference is how you’ll earn – instead of clipping, all Box Tops will be earned digitally via receipt scan. 

You’ll now download the new and improved, user-friendly Box Tops app, register and select a school, and then scan an eligible receipt containing Box Tops products.  You’ll earn 10 cents for each Box Tops product purchased plus extra earnings for any Bonus Box Tops opportunities.  The app will automatically add Box Tops to your school’s earnings online, giving visibility to see how you are supporting your school in real-time. 

Can I still send in regular Box Tops clips?

Yes! Keep clipping regular Box Tops and sending them to your schools as long as you continue to find them on packages.  Your school will still get credit for all Box Tops validly submitted by your school’s coordinator.    (Don’t send in the new Box Tops icon used to mark products that are eligible for Box Tops earnings via receipt scan in the new Box Tops App.)

Remember to scan your receipt in the Box Tops App, too: most brand teams are awarding both the receipt scan earnings and the traditional Clip earnings for a single item purchase during this time of transition. 

When will the changes occur?

We were expecting the packaging with the new Box Tops branding (removing physical clips) to be on store shelves beginning in June.  However, we’ve learned that some packaging has arrived a bit early, please scan receipts with those items in the current Box Tops Bonus App to earn for your school. You’ll see the Box Tops icon on the majority of the participating products by the end of the summer, with all packaging expected to be transitioned by early next year