After becoming a
lawyer, Tan Singh came to
Barmer again and he started advocating here. In the year 1949, he was appointed as the first chairman of Barmer Municipality. In the 1952 elections, Tan Singh was elected to the first
Legislative Assembly of
Rajasthan from
Barmer. He was re-elected as an MLA in the year 1957. In 1962, Barmer got only Rs 9000 from
Jaisalmer’s largest constituency. MPs were elected by spending. Lost the 1967 election, then started his own business and also provided employment to many of his colleagues. Re-elected MP in the year 1977. Tan Singh also joined the movement against the ban on
Rashtriya Swayamsevak Sangh after Gandhiji’s assassination in the year 1948 and also got voluntary arrest. ==Social work==