Welcome to the Community, @bknewbie1.
I’d be glad to help effectively track your charges for your account.
In QuickBooks Online (QBO), you can record your transaction anytime you want and choose which reconciliation period to include it in.
To ensure that the recording is accurate, I recommend consulting an accountant. You can also inquire about which date you should use in your recording.
To create an expense transaction, please see this link: Enter expenses in QuickBooks Online.
You'll want to read this article that will guide you on how to reconcile an account in QuickBooks Online.
If there's anything else that I can help you with, feel fee to leave a comment below. I'll be around to assist you further. Wishing you the best.