"I have a few years of football left, being in a World Cup for a player of my age would be something very nice," Tevez said.
The former Manchester United and Juventus striker, who turns 34 next month, last played for the national side in October 2015.
But Tevez will be happy to settle for just playing after a lucrative but ultimately miserable 12 months with Chinese club Shanghai Shenhua. "I'm fine. It's much easier if I'm happy - and I'm happy," he said.
Boca chairman Daniel Angelici said no money changed hands in bringing Tevez back to his former club.
Tevez joined Shenhua in January last year on an estimated 730,000 euros-a-week (HK$6.8 million) salary, making him one of the world's highest-paid players.
Tevez scored only four goals in the Chinese championship during an injury-marred season in which he missed the Chinese Cup final which his team won. "I have no regrets. When I made the decision [to go to China] I took it knowing the consequences," he said.
Tevez's main goal now is to win the South American Copa Libertadores club championship with six-time winners Boca. The Buenos Aires club last won it in 2007.