PAYE/payroll corrections to previous periods submitted by a different platform

Thanks for joining the Community, @jimbohc 

It isn't possible to submit a correction of employers NI from previous tax years in QuickBooks. We recommend reaching out to HMRC for best advice on reporting the underpayment.

Get back to us below if there is anything that we can help with!

Many thanks for coming back so promptly.

I clearly didn't explain the situation well enough. The underpayments are not for a previous tax year but for the current year.

The issue is that the original FPS reports were submitted by our previous accounting platform and not QBO. We no longer have access to that platform so were looking for a way to report/change the misreported periods through QBO.

I suspect this isn't possible but wanted to check before going directly to HMRC

Thanks for any updates based on the information above.

Thanks for getting back to me with that added information, @jimbohc 

The only way re-submit figures on an FPS/EPS would be to rollback payroll to the point where you need to make the correction and re-submit each period as Option H - Correction to an earlier submission. It wouldn't be possible to amend only employer NI figures. Hope this helps!