I've had my abn since 01 dec. But only used it during mid 2002. Only earning $6,600. The business is listed as personal and with that income which to which i had invoiced the company had my abn details on it. I would assume that taxtation office would have known about this (as i invoiced the co. with my abn)? What forms do i fill in if i have to? Does anything come by in the mail?