I also need a answer for this!

Hello there, lbarilelcsw & joshb1029.

I'm here to help you connect with the right support team to assist with the void button not appearing on the 1099 page.

This void button is an issue of a newly opened investigation. Currently, our product engineers are implementing a solution. I would recommend contacting our QuickBooks Support experts to add you to the list of affected users and receive updates once it's available.

Here's how:

1. Navigate to the Help menu at the upper right.
2. Go to the Search tab.
3. Press Contact Us at the bottom part. 
4. Enter your concern in the What can we help you with? box.
5. Click Continue.
6. Select Chat with us or Have us call you.

In addition, you'll have to manually submit an amendment to the IRS if you need to make changes. 

If you require further assistance with voiding your 1099, please post them in the comment below. I'll be happy to help.