in core payroll has the issue with the employers NI allowance not being deducted been resolved. We were told to do a JE to correct this temporarily?

It's great having you here in the Community, jplewis60. I'd be glad to share with you the specifics about National Insurance (NI) deductions in QuickBooks Online Payroll Core.

After reviewing recent cases, we've found that all reported issues regarding NI not deducting properly have been resolved. However, if you're experiencing similar problems, I recommend reviewing your employee's profile and making sure the National Insurance number is correct.

Here's how:

1. Go to Payroll, then click Employees.
   
   
2. Choose an employee.
   
3. Select Tax information and review NI number.
   
   
4. Once done, hit Save.
   
   

However, if the issue persists, I recommend reaching out to our support team. They are equipped with tools that can check your account internally and investigate this issue further. 

Here's how:

1. Sign in to your QuickBooks Online company.
2. Select Help (?).
3. Select either of these tabs:
4. Assistant tab and select Talk to a human.
5. Search tab and click on Contact Us to connect with a support expert.

In the meantime, I agree with using journal entries in tracking National Insurance temporarily.

Moreover, I've added this article as your reference in managing your employee's information: Edit or change employee info in QuickBooks Online Core Payroll.

Keep me posted if you have clarification about National Insurance deductions in QuickBooks Online Payroll Core. I'm always here to help you.