956和956a的区分是:
956是Advice by a migration agent/exempt personof providing i妹妹igration assistance
956A是Appointment or withdrawal of an authorised recipient
956a 里有这么段话 Do not use this form if:
• you are appointing a migration agent or exempt
person to provide you with i妹妹igration assistance and they will also be your authorised recipient.
In this case the migration agent or exempt person should
complete form 956 Advice by a migration agent/exempt
person of providing i妹妹igration assistance. 所以我的了解是只有956就能了。