You can most places, Walmart, target, depending on the package cvs and Walgreens too
You can exchange as long as they have that product at both target or Walmart. Be sure to check the counts tho and make they they have a barcode on it (not separated from a Larger box). Walmart has its own count boxes supplied different than the counts at Target and Amazon.
I just counted mine because my MIL asked, I have freaking 13 boxes of 1s