To extend the validity, please follow the below mentioned steps
Step 1 : Go to the E-way bill section >> Select the E-way bill >> Click on more option >> Click on extend validity.
Step 2 : Enter the details >> Click on extend validity.
Note : You can extend the validity only before 8 hours and after 8 hours of the E-way Bill validity.
You can see the validity of the E-way Bill under the E-way Bill number.