Contradiction with 2 Kings 24:16
This verse describes the captivity of skilled men, whereas Ezra 8:9 describes the return of the people.
2 Kings 24:16: And all the men of might, [even] seven thousand, and craftsmen and smiths a thousand, all [that were] strong [and] apt for war, even them the king of Babylon brought captive to Babylon.
Contradiction with Jeremiah 24:1
This verse details Jeconiah's captivity, conflicting with Ezra 8:9's notion of returnees.
Jeremiah 24:1: The LORD shewed me, and, behold, two baskets of figs [were] set before the temple of the LORD, after that Nebuchadrezzar king of Babylon had carried away captive Jeconiah the son of Jehoiakim king of Judah, and the princes of Judah, with the carpenters and smiths, from Jerusalem, and had brought them to Babylon.
Contradiction with Ezekiel 1:1
Ezekiel describes being among the captives, which contrasts with the return journey in Ezra 8:9.
Ezekiel 1:1: Now it came to pass in the thirtieth year, in the fourth [month], in the fifth [day] of the month, as I [was] among the captives by the river of Chebar, [that] the heavens were opened, and I saw visions of God. [captives: Heb. captivity]