If you are looking for Portuguese subtitles for the 2012 series, several dedicated subtitle communities and databases traditionally host them:
The most famous Brazilian community for crowdsourced subtitles. You can search for "Ink Master" to find packs uploaded by fans for various seasons. Ink Master (2012) Legendas
Tattoos culture has a lot of specific English slang that often gets lost or sound unnatural when dubbed into Portuguese. If you are looking for Portuguese subtitles for
Ensure the video file and the subtitle (.srt) file have the exact same name (e.g., Ink.Master.S01E01.mp4 and Ink.Master.S01E01.srt ). Ink Master (2012) Legendas
Put both files in the exact same folder on your computer.
One of the largest global databases for subtitles. You can filter your search specifically for Portuguese (PT-BR or PT-PT) files.