Yes vshaffer. You can close the books monthly in QuickBooks Online (QBO) in a similar way to how you would for the year.
The process involves setting a closing date and a password to lock the completed transactions. By doing this each month, you can ensure that no one can modify the data for that period.

Additionally, I've included these articles to guide you through changing your closing date and password, as well as closing your previous fiscal year and preparing for the new one:
For any follow-up questions about closing your books, drop a comment below. Our Community experts are readily prepared to offer support and guidance.