Need help on running off-cycle payroll for Bonus payment

Hello Guys,

Need your help on running off -cycle payroll for our client here.

1) Bonus is already paid through cheque in the month of October without SAP entries.

2) Bonus is paid a ceratin amount to all the employees who have completed 1 year of service.

3) Now the client wants to show the bonus amount available for tax deduction in Form 16.

4) So for showing this entries in offcycle payment, what month should the retro payroll to be run??

Havn't done this off cycle payment before so any help is really appreciated. If possible please give detailed description.

Thanks,

Mangirish