Choose what's suitable for you:

1. Adding Auditor details (as client in LodgeiT), then you will link to in your tax form

2. Other way around, if you do not want to add the said "Auditor" as your client in LodgeiT. You may manual add the details of  the auditor via the SMSF form, then the said details will also rollover to the following years (no need to re-key it)