Re-Efile past period rejected/failed/unsuccessful FPS returns in current tax year. How?

If your past period FPS returns did not get submitted successfully, you can follow the procedure below:

Road Map - To Re-EFile past period rejected/failed/unsuccessful FPS returns in current tax year
E-Filing RTI -> E-file RTI FPS, EPS, NVR, YTD FPS -> FPS (Full Payment Submission) link -> Select the appropriate "past period" from the "Select Pay Period" drop down -> Continue button -> Live E-filing button
( 'E-Filing RTI' is the button positioned in the tasking zone menu at the top. It is the third button from the left)