It will not let me add a new customer to create an invoice. It tells me that "something isn't quite right"

Good evening, @skstransportllc-. 

It's great to see a new face here in the Community! 

Let's try using a private window or incognito window to help eliminate any errors or glitches that may be occurring in the system. Here's how depending on the browser session you're using: 

• Google Chrome: Ctrl + Shift + N 
• Internet Explorer: Ctrl + Shift + P 
• Safari: Command + Shift + N 

If this works, go back to your regular session and clear your browser's history. If not, use a different supported browser. 

Please let me know if this worked for you or if we need to do some additional research into your issue. I'm only a post away!