How do I set pension deduction to net based from relief at source in standard payroll online

Hello Carol, 

Which Pension Provider are you with? 

Some providers have a pre-set deduction method based on the provider's guidelines.

If you create the pension in QuickBooks manually within the payroll settings by going to Pension Schemes > Add pension > 'Other' under 'Select your provider', you'll be able to enter the details manually and select from the three taxation methods. 

Thanks