Hi there, Info2383. Please note that QuickBooks Online Payroll Core automatically marks your final FPS based on your payroll data and timing. This manual option is only available in QuickBooks Online Payroll Advanced.
To confirm your status, navigate to All apps, select Payroll, and click Payroll taxes. Scroll down to Archived forms and filings to review your FPS filing status and look for indicators or a confirmation email.
If you do not see these updates, ensure your payroll data is complete for the tax year. I also suggest reaching out to our Live Support team for them to review your account and ensure your FPS is submitted on time. Be sure to check their support hours to ensure you receive timely assistance.
If you still need further assistance, please don't hesitate to leave a post below.