A price tag in a dream is read as a question of value — what something costs you, or what you think you are worth. A tag left on new clothes can point to a change that still feels unfamiliar.
Has this come up in your dreams before? What was going on in your life then?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.