How the validity time of e-way bill can be extended ?

The e-way bill offers the option to extend the validity. This option can be used to extend the validity of an e-way bill for up to 4 hours before expiry or after expiry. Enter the number of the e-way bill and the reason for the request. You may notice that he cannot alter the Part-A details. The remaining travel distance will determine whether he is eligible for extended validity.