Starting to use payroll remittance function middle of the year

In effort to merge 2 separate databases, I've manually re-entered our payroll from beginning of the year. In the old database, remittances were paid through payables module. I would like to change this going forward and use the remittance function instead. However, since I haven't recorded the remittances prior to the current pay period, it wants to pay the entire year. I've just started our new fiscal year and had planned to sort these entries later once I've caught up on daily work & once I'm confident enough to do so properly. I would be very grateful if given instructions on how to properly record past remittances so that I can go forward with the current remittance using this module. If it's even possible that is.