HM Revenue & Customs' portal (which shows your outstanding PAYE/NIC liabilities, as well as any previously filed CIS300 submissions and subcontractor tax treatment verifications, etc) is actually a separate standalone product (and government department!) and is not connected with commercial software providers at all.
Therefore any submissions that you make via Gateway Solver, or one of our competitors such as Quickbooks, or Sage, will not appear as viewable or editable within the HMRC online portal.
Instead, your returns will be viewable in our Gateway Solver portal (or we can provide assistance with your report history, just ask!) or your own third-party accounting product.
We are assisting HMRC to research and develop a solution to allow third-party commercial online filing software to view return history and tax liability information which should be available to the public some-time in 2018.