For the third time in as many weeks I have encountered an issue with 18-19 tax codes.Each case is the same.For 17-18 a zero pay and tax is submitted for the employee. For 18-19, salary is paid on the commencing year (correct) tax code but then HMRC later changes the code to 1185L for no reason.We are also the employee's agent, so on contacting the agent line, we are told "the fault is with the employer's payroll software, they've created a new record under RTI and we have to use code 1185L in such cases." They agree the code might be "wrong" but they can't change it. It is the proverbial buck passing when we ask if it just might be an HMRC problem- "you'll have to contact digital services not us". The thing is, of course, if it is an HMRC error, it will be causing more call traffic to the Agent Helpline. The software provider Moneysoft, like ourselves, are incredulous. We have used Moneysoft, and no other provider, for both tax years. The employees did not leave and then rejoin. In each case we submitted a final EPS "final notification" no later than final pay date i.e on or before 5 April 2018 with no adverse messages from HMRC thereafter. Payroll agents not acting also for employees will go ahead with the code change. Ultimately this could cause underpayments that I would regard as ESC A19 fodder given HMRC is refusing to change a code they agree is wrong. Has anyone discovered what is going on here? Is it just yet another example of flaws with HMRC digital services?