Hi Koala, 

You can use the Invoice-Sample word document as a template for your import style. You can edit from Tax to GST and later on, map it with GST in your QBO file after GST being turned on in your QBO file. In doing so, the amount will be picked up and included in your BAS. Again, we would encourage you to do this after the data migration. 

You can also change the order of the columns on your table but you might not be able to add more than the items QBO would have on the sales form which usually contain the followings:

- Service date

- Product/Service

- SKU

- Description 

- Qty

- Rate

- Amount

- GST, and 

- Class (if you have the function turned on)

Hope this helps.