When i am booking purchase invoice with VAT, VAT amount is showing in suspense account.
Your problem is almost certainly that your tax code is not linked to a tax liability account. Check this on the Edit screen for the tax code under the Settings tab. Read the Guide: https://www.manager.io/guides/8901.
I also notice that you entered a discount as a separate line item. A discount is a price reduction, so it should also have had the same tax code applied. Otherwise, your claimed input VAT will be too much.
Thank you for the solution.