Update a table using a form and a specific ID, Access 2010

Hello,

I have been attempting to build this for a few days and decided to scrap my original design and attempt something different.

I am trying to update data in a table for a specific ID. However, in my form, I would like to bring up data based on a REG# and a ServiceBulletin. I would like those two variables to filter all of the data on the form. I would then like to update the work order and completion date for the REG# and ServiceBulletin and save it to the specific ID.

Any help is appreciated.