Welcome to the Community, @leerafael74-gmai. Let me share some insights about importing and using payroll in QuickBooks.
If you wish to use QuickBooks payroll, you'll have to subscribe to a QuickBooks Payroll Service. To learn more about its features and prices, you can check out this article: Online Payroll services.
For filing purposes, it would be best to have a copy of your payroll data from your previous year once you decided to move to QuickBooks Online Payroll.
Then, manually enter the details into QuickBooks. While the option to import your payroll data in QuickBooks is unavailable, you'll want to enter them through the prior payroll process.
Additionally, I've attached some relevant articles you can utilize to help manage your payroll data in QuickBooks:
As always, feel free to reach out to us again if you need more help setting up your QuickBooks Online Payroll next year. I'll be happy to lend a helping hand. Keep safe!