Thanks for joining the Community space, @christopher walking. Allow me to share some ideas, so you can save your expenses.

Did you get any specific error messages when saving the expenses? Additional information about this concern will help us look for the right solution in solving the problem.

In the meantime, let’s perform some basic troubleshooting steps to make sure the issue isn’t browser-related. Local internet cache files may be the reason for this unexpected behavior. 

Let’s start logging in to QuickBooks using a private window. Here’s how:

•  Command + Shift + N (Safari)

•  Ctrl+ Shift + N (Google Chrome)

•  Ctrl + Shift + P (Mozilla Firefox)

If you're able to save it, go back to your regular browser and clear the cache. If the same thing happens, use another supported browser. It could be that the one you're currently using has a temporary issue with QuickBooks.

For more details on how to manage your expenses, you can check out this article: Enter and manage expenses in QuickBooks Online.

Also, if you need more help in managing your company financials our articles can point you in the right direction. They have guides and detailed information when handling customers, vendors, expenses, income, reports, etc.: Help articles in QuickBooks.

I'll lend a hand again if you have more questions for QuickBooks Online. Just reply here and I'll lay down the details and steps for you. Have a good one!