I have a FPS showing as overdue but I filed it on time last month. QB won't let me submit current month FPS as it says last months is outstanding. What do I do?

I filed last month FPS when I ran payroll (the day before the pay day) and it submitted successfully but QB is telling me it's still outstanding. When I press 'file' on it to try and clear it QB tells me I've already filed it! I am unable to file current month FPS as it says I have one outstanding but I don't! How do I resolve this?