If you are looking for the original Arabic PDF to use with translation tools, the full 30-volume set is available for free download on QuranicThought.com or a particular thematic analysis from his Tafsir to help narrow down your search?
: While not the Tafsir itself, his seminal work on the higher objectives of Islamic law is available in English through the International Institute of Islamic Thought (IIIT) . Key Features of Al-Tahrir wa’l-Tanwir tafsir ibn ashur english pdf
Independent scholars and academic institutions have translated specific chapters (such as Surah Al-Fatiha or Surah Al-Baqarah) or specific theological passages from Al-Tahrir wa'l-Tanwir . These are often published as research papers or short ebooks. If you are looking for the original Arabic
Because the work is deeply rooted in advanced Arabic sciences, reading even an English translation requires preparation. Here is how you can get the most out of his insights: These are often published as research papers or short ebooks
Several publishers have released "The Meaning of the Quran: Based on Ibn Ashur's Tafsir" (not the full text, but the key takeaways). It is a 1-volume 800-page summary. While not the original, it provides the Tafsir's conclusions in English legally.