In order to finalize the Kickstarter campaign page, you have to have a verified Amazon Payments account.
Originally I had my personal Amazon Payments account tied to the Kickstarter page, and it only took 5 seconds to verify it. But when I tried to switch over to Business Amazon Payments account, it said it would take about 7 days to verify it.
Plus it kept saying all the company information I entered wasn't correct, just like what happened with D-U-N-S number, so I had to scan and fax my incorporation and EIN documents to them.
It was a bummer because I was completely ready to go, and now I have to wait for almost a week to launch the Kickstarter campaign.