The 2021 Form 8606 should have had $6,000 on line 1, 3, 4 and 14. The amount on line 14 carries forward to line 2 of your 2022 Form 8606 were it gets added to the $6,000 on line 1 for a total of $12,000 on line 3. $12,000 should also be present on line 5.
