Create the default value in the batch design:
 

  1. Go to Data > Batch Entry
  2. Go to Batch Designs
  3. Edit the batch design used by the import process
  4. Select the field you would like to set up the default value
  5. Specify the value under "Field defaults"
  6. Save the batch design

Edit the import process to account for the default value in the batch design:

  1. Edit the import process
  2. On the Options tab, select "Default value from batch" in the "Other" section
  3. Save the import process