Please check the following flag in Accounts Settings Automatically Add Taxes and Charges from Item Tax Template
Taxes get added multiple times usually if this flag is checked
I went to Accounts Settings-> Automatically Add Taxes and Charges from Item Tax Template and Checked it and then save the setting. Then I Un-Checked it then saved the settings.
Now all of a sudden the GST Tax are not coming automatically.
I tried with multiple browsers and I have checked after clearing the cache of browsers. But still the same issue persist.
If I check the checkbox Accounts Settings-> Automatically Add Taxes and Charges from Item Tax Template then it will fetch all items of GST.
When above mentioned setting is unchecked I have to select Purchase Taxes and Charges Template in case of Purchase Order and Sales Taxes and Charges Template in case of Sales Order to get Purchase/Sales Taxes and Charges.