Is there a way to amend what is included in field ‘158 Pay After Statutory Deductions’ on the FPS?

Summary:

Is there a way to amend what is included in field ‘158 Pay After Statutory Deductions’ on the FPS? Or, is there a different way to create this element and meet my business requirements?

Content (required):

I have created a new element which is a benefit outside of payroll that needs to be taxed and NI’d through payroll. I have created an information element and added it to the taxable pay, NIable pay and benefits taxed through payroll balance feeds. When running payroll all the figures look correct. E.g. gross, taxable, NIable and net pay.

When running the FPS all the other fields are reporting as expected except this one. This one is reporting the gross pay plus the benefit amount less tax and NI.