In a relationship, the Last function can be used to access data from the last related record. There may or may not be any such relationship used here, however as you have not described the design of your database.
You can also put the cursor into the field and press ctrl-' to copy data from the same field of the previously accessed record. Again, that may not serve in your situation, but if it does, it's simple to use.
You can also set up a relationship or use an ExecuteSQL query that matches to a record from which to auto-enter data and this can be the most recently created record in the table prior to the one that you are currently editing.
not ExecuteSQL if the record you are currently editing is already opened and the record count is more then couple hundreds because
ExecuteSQL on the same table slows down if it has opened records on same session ..