Welcome to the Community, @farmse. Let me help share insights to find the specific data on a reporting period.
Every payroll reports you see in QuickBooks Online Payroll are unique. When you want to see a specific period of data, you can change the reporting period and set it to that particular month (January).
Here's how:
Go to Reports from the left panel.
From the Standard tab, go to the Payroll section.
Select the Payroll Details report.
Click the report period field and then select This month.
Hit Apply.
I'm adding these articles for more ways how to keep a copy, view, and save customized payroll data: