I'd be glad to help keep your QuickBooks Online run smoothly, sga3.

For the best performance, it's generally recommended to use Google Chrome. If the issue persists, you might want to close other open programs or browser tabs that you are not currently using to speed up QuickBooks Online.

Each program or tab in your search engine uses your system's resources, and if too many are open, this can cause QuickBooks to run slowly.

However, if it's still running slow, we can do some of the basic troubleshooting steps by accessing your account in a private window.

Here's how:

• Google Chrome: Press CTRL + Shift + N.
• Safari: Press Command + Shift + N.
• Mozilla Firefox: Press CTRL + Shift + P.

Once signed in, open an invoice from there. If it rectifies the issue, go back to your main browser and clear its cache to remove the portal's history. You may also try accessing your account using another supported browser.

Additionally, you can visit the following write-up: Sales and customers. This will provide you links on how to manage your company income as well as sales invoice.

I'm only a post away if I can be of additional assistance or need more help with QuickBooks invoices. I'll be around to keep helping. Wishing you a wonderful rest of the week.