You can simply check your FASTag balance on your Park+ app using these steps:
1. Click on 'FASTag' tab on the home screen
2. Click on ‘Recharge’
3. Enter your vehicle number
4. You'll be able to see the available FASTag balance under your vehicle details
5. Click 'update balance' to view the updated FASTag balance
In addition, you can check the FASTag balance for most issuer banks on the Park+ app now!