Requery Dilemma

In Access2000 - frontend, SQL - backend, I have a form and a subform. The
form contains data specific to an order that we received inclusive of a
DueDate. (The DueDate is automatically generated once certain criteria have
been met.) There are certain instances when the DueDate has to be changed.
Therfore, I created a command button which takes the user to the subform.
The subform allows the user to change the DueDate + / - a specified number
of days. The enter a reason why the date is being changed then exit the
subform and return to the main form which is still open.

My dilemma is that once I exit the subform, I need the main form to update
the DueDate with the new date established in the subform, and I don't want
the user to have to search to locate the job they just changed. I believe
this can be done as a Re-query, but my knowledge of re-querying is limited.
Is the requery done in the sub-form or the main form? What is the structure
of the code used? Please help.

Thanks
Rookie