First post. You have to search through target circle offers and can either search for starbucks or just filter by popular. Expires 9/21/20. Must have valid Target Circle account. If you've never used the circle before, just add the deal to your wallet than go to wallet option and it gives you a barcode which you have the barista scan. You can still pay with Starbucks card or app to earn stars.
Note: One minor inconvenience is that drinks and food purchased from Target Starbucks no longer apply to the star challenges through the app so no more double dipping. The terms and conditions on the challenges say "Purchases through Starbucks stores" which Target locations are not. When I found that out I was a bit disappointed but the 20% is well worth it.
Terms & conditions
Each Circle offer can be used for a maximum of 4 qualifying items per transaction, unless otherwise noted. Limit 1 Circle account per transaction and 6 Circle transactions per day. Void if copied, scanned, altered, transferred, purchased, sold, or prohibited by law. Offer expires 11:59 PM PST. Cannot be applied to previous purchases. Item(s) may not be available at all stores. Quantities limited; no rain checks. Offer value may not exceed value of item purchased. No cash value