Under the objects list on the left hand side of the MS Access interface select tables, from the list of tables highlight the table that you wish to add records.
From the standard menu bar across the top of the screen select "insert" and from the list of options select "autoform" and a wizard will create a new form for you.
Along the bottom of the form you will see a record navigation bar, on the far right is a button marked with an arrow and a star like this ">*" click this button and you are in the add a new record mode.