Yes, you can release your mastered album to online stores.
Once your album has been mastered, you’ll be able to upload it to the release builder in its entirety. Make sure to select the desired intensity you’d like delivered to stores before beginning the release process, and that each track you submit is in WAV format.
You’ll also have the option to release the tracks within your mastered album individually. From there, you can enter the rest of the metadata for your release and submit the finished product.