If you have unchecked the box to invite your Contractors in filling out the rest of their details (it’s easy), here’s how to update their email in your QuickBooks:
Click the Workers tab on the left.
Choose the Contractors tab.
Find the specific contractor’s name and click on it.
From the Personal details section, click the Edit icon (pencil image). Or just click the email address, update their email and click Save.
However (here’s the issue here), if you’ve initially checked the box that says Invite them to fill out the rest (screenshot below). There currently isn’t a way of updating their email address anymore.
Send them your feedback (click the Gear icon in the upper right corner and choose Feedback).