There is an audit trail of the FPS and EPS submissions that have been attempted through 12Pay (the Earlier Year Update (EYU) does not appear in this list). To check this select the company name and then the ‘RTI‘ tab, this table will display the submissions based on the submission type, period and tax year.
To check if a certain submission has been successfully received by the HMRC, select the correct line and scroll towards the centre and look for the headings ‘Receipt ID‘ and ‘Success’. If an ID number and tick box is apparent in those fields then it has been successfully received (this information isn’t generated by 12Pay but by the HMRC and then sent to 12Pay). If not then the revenue hasn’t successfully received this, usually, if this is the case the failed FPS or EPS will generate again on startup on 12Pay for you to resend.
Please note, any submission that has just been sent will not have a receipt ID, you will need to refresh (close and reopen) 12Pay for this information to populate.