Invoice "save and Send" issue

Thanks for becoming part of the Community, dclark2171. I appreciate your details of what troubleshooting you've performed so far.
 

I've reviewed our ongoing/solved investigations and was able to find one about this same issue with the Save and send button.
 

Since this problem isn't related to your browser, I'd recommend getting in touch with our Customer Care team and referencing INV-55533. They'll be able to pull up your account in a secure environment, conduct further research, and add you to Intuit's list of affected users. Doing so ensures that you'll receive email communications about any updates relating to the investigation.
 

They can be reached while you're signed in.
 

Here's how:

1. Use your Help (?) icon.
2. Click Contact Us.
   
3. Enter a description of the situation in your What can we help you with? field, then click Let's talk.
   
4. Select Start messaging or Get a call.
   

Be sure to review their support hours so you'll know when agents are available.

I'll be here to help if there's any questions. Have a lovely Monday!