Nope. The seventy years was a period of the Exile in Babylon, Desolation of the Land of Judah and Servitude to Babylon beginning with the Fall of Jerusalem in 607 BCE. and ending with the Return in 537 BCE. Nice and easy!!!
You're such a doofus. Of course the Bible never mentions 70 years of exile at all. But it's worse than that. According to the Bible, attention would be given to the Jews' return after 70 years had ended. But according to pseudo-scholar and other JWs, the Jews have already returned when the 70 years ends (even though most of the Jews remained in Babylon and the 'return' in 538 BCE was actually just permission to rebuild the temple), so turning attention to their return after they've arrived is just stupid.