I would like to know what Employee ID No is in payroll please?

Thanks for reaching out to the Community, @gulbindersandhu.

The Employee ID or payroll ID in QuickBooks Online (QBO) is a unique number for the employee and is required by HMRC to identify them during RTI submissions. It will be included on the FPS (Full Payment Submission) submitted to HMRC every payday.

For more information, consider checking out these articles:

• Edit employees in QuickBooks Online Standard Payroll (UK).
• Adding an employee in QuickBooks Online Advanced Payroll.
• HMRC Settings in QuickBooks Online Advanced Payroll.
• QuickBooks Online Advanced Payroll Hub.

Please know that I'm only a post away if you have any other questions or concerns. I'll be here to help. Have a wonderful day!