How Igst will apply automatically if supplier is from other state in purchase Bill

I'm here to help, mehul9k.

At the moment, QuickBooks does not have the capability to automatically populate IGST rates when creating a purchase bill. You will have to manually choose the rate from the Tax column.

Here's how:

1. Go to the + New > Purchase Bill.
2. Select the supplier from the Supplier drop-down.
3. Choose the Category and Tax.
4. Click Save and close.

Please see this sample screenshot for reference:

I'm adding this article for more information: 

• How GST impacts QuickBooks users.
• Know more about GST registration type for suppliers in QuickBooks

If you need help managing your QuickBooks Online account, you can view our other articles here.

Should you have other concerns or follow-up inquiries about GST in QuickBooks Online, please let me know in the comments below. Take care always.