Lobsto
Other posters have encouraged you to read Carl O. Jonsson's book refuting WT Chronology, Gentile Times Reconsidered in order to assist your understanding of the subject. However, you should be aware of the following problems with Jonsson's thesis which include the following:
1. When did the seventy years begin? COJ discusses both dates 605 and 609 BCE for the beginning but there are inherent problems with either date.
2. What was the actual length of the period? COJ is uncertain on this point either it was literally 70 years, a round number or 66 years.
3. When did the 70 years end? COJ states that the period ended with the Fall of Babylon in 539 BCEbut again there are problems with this interpretation as it clashes with the direct testimony of the prophets who lived at that time
4. Why is it that despite the so-called accuracy of Neo-Babylonian Chronology there is no agreement within current scholarship about the precise calender year for the Fall of Jerusalem namely 586 0r 587 BCE. COJ favours 587 BCE but most leading scholars prefer 586 BCE.
Enjoy!!!
scholar