Brother MFC-J825DW - Manual (Page 117)

Brother PC-FAX Software (MFC models only)
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b
From the Available Items column choose the data fields you want to import, and click Add >>.
Note
From the Available Items list choose the fields in the same order they are listed in the import text file.
c
Choose Tab or Comma based on the file format you are importing from Divide Character.
d
Click OK to import the data.
e
Enter the file name, and then click Open.
Note
If you chose Text in a, Files of type: will be Text files (*.txt;*.csv).