Add field for PAYG Withholding number

For people without ABNs but require the payroll functionality, there is no field to capture our PAYG Withholding number.

I would like to put it on the payslips and I'm pretty sure that when it comes time to do the annual payment summaries it will also be missing.  My current work-around is to add the number to the end of the company name field.

It would also be appropriate to factor it in the One Touch Payroll functionality to be implemented for those under 20 employees next year (subject to legislation being passed).