If your refund is retained, we will notify you by the RBA interest day or within 30 days of lodgment of the return. (ato.gov.au)
This week the ATO announced that it will extend the due date for lodgment of self - managed superannuation fund (SMSF) annual returns for 2016 — 17 to 30 June 2018. (ato.gov.au)
The extended lodgment due date is 30 June 2018. (ato.gov.au)