I submitted a new employer request on 15 March 2021.
I didn't get any details in the post.
I phoned HMRC and they had no record of my acknowledgement reference or company.
They said they could take the details over the phone.
I made it clear that the first payment date was 31 March 2021.
I tried to submit the FPS and EPS.
I got an error saying "This submission cannot be accepted as it does not fall within the eligible filing period"
I phoned HMRC. They said that the previous HMRC person had entered 08/04/21 as the payment date. They changed it to 31/03/21.
I submitted the FPS and EPS again and got the same error.
I phoned HMRC. They said that the payment date was 31/03/21 and they couldnt understand why there's a problem. They suggested using HMRC Basic Tools. I queried how that could be a solution to the specific problem I had. They said that was all they could think of!
I used the HMRC Basic Tools because when I phoned HMRC back they told me they couldn't answer calls. I submitted the FPS and EPS again and got the same error.
I phoned HMRC again. They said that the payment date was 31/03/2021 but the "mandation date" was 08/04/21.
I asked what the "mandation date" was. They said they didnt know except it had to be the same as the payment date.
I asked why bother having the "mandation date" then and why not just use the payment date. They said they didn't know!
I now have to wait another 72 hours before I can try again.
If you want to mess something up you only have to contact HMRC.