[citation needed] His exposure to public service brought him to the parliament of the streets during the latter part of the Martial Law years.

He finished his legal studies at the Manuel L. Quezon University - School of Law, and with a never give up attitude, passed the Philippine Bar Examination on his third try.

[3] Tañada started his political career by winning the seat of the fourth district of Quezon Province in the House of Representatives in 2004.

[4] He was at the forefront of the second high government official to ever be impeached, Philippine Ombudsman Merceditas Gutierrez, for betrayal of the public trust.

[9] For the 2022 General Elections, Former Deputy Speaker Erin Tañada served as the campaign manager[10] of the Team Robredo-Pangilinan (TRoPa) Senatorial Slate which produced three winning candidates, he is quoted during the campaign with the statement, "“Kahit ano pa ang kulay mo, kung ikaw ay para sa pag-usad ng ating bansa sa ilalim ng isang gobyernong tapat, welcome ka!”