I follow the Taqleed of one Marja and have access to his Tohzil e Masail. However, I encounter some questions outside the syllabus for which I do find answers in another Marja's Tohzil e Masail. What should I do in this situation?
Bismihi ta'ala
Alhamdulillah, all our esteemed Maraji' have official websites and easy channels of commication. Just make sure they are "official". Regarding scenarios or questions you might not find in his Tawdhih al-Masa`el, or Risalah 'Amaliyah, their websites usually have frequently asked questions, and you can also email, ring, or visit the office in person, or ask the Marja's wakeel.
And Allah knows best