I'm a sole trader who is about to go over $75k income for this tax year. I'm not registered for GST and so have not been charging/adding it to my invoices.
Once I've registered, will I only owe GST for invoices sent from the date I registered (that have GST added), or will I owe GST for all income prior, up to the $75k, that I did not charge my customers GST for? If so that'll be a huge bill I cant afford.
Thank you in advance.