How do I retrieve SIN# for employee contact list if I do not use QB online payroll services?

Hi there, 

Welcome to the Community. It's important you're able to retrieve the SIN number. I'll be happy to share more info about updating an employee's details in QuickBooks. 

In order to achieve the goal you've reached out about, I recommend checking out the following article as it shows you how to: View an employee's Social Insurance number. You can also retrieve the SIN number by reaching out to the employee in question and having them share their SIN with you. 

Let me know if this info helps. I'll be one message away in case you have other questions.