Offcycle - US & CANADA

Dear Experts,

We have question on processing of offcycle between US & CA.

Example:

1) Pernr A - USA          Pernr B - CAN

2) Control Record Exited for for both US and CA at 46-2013 period

3) Both pernr evaluated upto 45-2013 period

4) These two pernrs are being run Adj payroll for 46 - 2013 period

While we run offcycle for US, the tax is calculated in section A and for CANADA Tax is calculated in section B. We are having issues with PRE-TAX deductions owing to the following. Can someone tell us where in schema it is determined that it has to calculated in section A or B?

Thanks