All my suppliers freight charges have GST. Is there a way I can make a default of 10%GST on the built in Freight-in account?
I know I can add it in on the purchase invoice manually but it would be handy if it could be done automatically as a few times now I’ve forgotten to dos so and the invoice totals have been wrong until I correct it.
I did set up a separate account for freight which sort of did the job, but the built in account works better as far as allocating across inventory.
I’ve looked around and can’t find anything on it.
You cannot do this. The built-in freight-in charge is not an account. It is an added cost that goes into Inventory on hand, divided amongst the inventory items purchased on the invoice. It is hard-coded in the program, so, unlike inventory items themselves, you cannot set a tax code for it.
I think you have already realized the best method for monitoring: if the total of your purchase invoice does not agree with your supplier’s sales invoice, check the tax code on freight-in first.
Just thought that I would update this as I have had to go through 18+ months of purchase invoices where GST had not been assigned to Freight-in as
does not work when purchase invoices prices are shown tax inclusive.
For anyone else having the same issues I have found that using form defaults has remedied this.
Probably could have done this back when first posted but was not aware then that a line item could be added to the default.
Hope this helps someone. 
You can actually add multiple lines.
For your case having two may work better, one for user entry and the freight in pre-set as desired.
Yeah, that is actually how I have it set. Just showed the example of how I first set it up.
Glad it was the nice lady from the ATO that picked it up while going through some stuff with me (thanks Deborah). Saves me trying to explain in depth why the ATO owes me over two grand in unclaimed GST…yay.