No, Tazorac (tazarotene) and Retin-A (tretinoin, all-trans retinoic acid) are not the same, but they do belong to the same class or group of drugs known as retinoids.
Retin-A is a first-generation retinoid and was the first topical retinoid to be developed. Tazorac, on the other hand, is a third-generation retinoid. A key difference between Tazorac and Retin-A is that they have different chemical structures.
Tazorac and Retin-A work about the same when used to treat acne and are also similar in terms of the side effects they produce.