Item wise Tax Setup With In State Out State - jigneshpshah/greycube_helpmanual GitHub Wiki
No Tax Category
Item Wise Tax Template used just to fetch Rate ( use standard one)
In Item define only rate ( 1 record - GST x%)
Use Sales Taxes & Charges Template to fetch the correct Ledger ( keep rates 0)
Define Tax Rule ( each for same state Shipping State & Billing State - In State , one blank - Out State) to automate the selection of the Sales Taxes & Charges Template