It does not let me save the expense manually input
Let me help you go over to your account and have your expense saved, userjfrye68.
Unable to save transactions in QuickBooks Self-Employed are usually the result of outdated or corrupt cache files in your web browser. Not to worry, you can clear them in just a few easy steps.
We can press the F5 key on your keyboard to refresh the page. If it's still doesn't save, we can do some of the basic troubleshooting steps by accessing your account in a private window.
Google Chrome: Press CTRL + Shift + N.
Safari: Press Command + Shift + N.
Mozilla Firefox: Press CTRL + Shift + P.
Once signed in, go back to your transactions page, enter the expense and save it from there. If it rectifies the issue, go back to your main browser and clear its cache to remove the browser's history. You may also try accessing your account using another supported browser.
Let me know the result of this troubleshooting in the comment below. I need to make sure you're able to save your expense transaction or if you have other questions in mind, please let me know. I'll make sure to get back to you as quickly as I can.