How do I edit the info in the 1099INT forms? At the CompleteCheck review, it asked for address info, and marked as invalid since it autopopulated the wrong state.

Try to edit this information in the interview section of the program instead of in the review section.  Follow the steps here to get to the interview section.

If after you review your input you are still getting the same error, you might need to delete the input and the re-enter it and see if that clears up the error.  To delete the entry, follow the steps above to get to the input section, and select the trash can icon to the right/bottom of the interest income entry.  Then proceed to enter it again.