I used to have a search bar for searching invoices but the search bar has disappeared. Does anyone know how to get it back?

I've got an idea on how to get your search bar back, hmkservice. 

For now, there's an ongoing investigation about it. Our engineers are working hard to find a resolution and have this feature back to help you with your workflow. In the meantime, contact our Customer Support Team to include you in the list of affected users. They will also send you email updates once it's resolved. Our live support is available M-F, 6 AM to 6 PM, and Saturday, 6 AM to 3 PM PT. 

Here's how you can reach them:

1. Go to Help and select Contact Us.
2. Enter "talk to a human".
3. Hit Continue.
4. Choose "Have us call you" to get a call from a support expert.

I'll also add an article to help you customize your invoices: Create invoices in QuickBooks Self-Employed (intuit.com).

We appreciate your patience as we resolve this issue. If you have further questions regarding invoices, drop a comment below. I'll get back to assist you.