To update the Part A transporter details in the E-way Bill, please follow the below mentioned steps
Step 1 : Go to E-way Bill section >> Click on three dots (in the E-way Bill, which you would like to update).
Step 2 : Enter the GSTIN >> Update.
Note : You can Update the transporter details only within valid till time and date of the E-way Bill.
You can see the validity of the E-way Bill under the E-way Bill number.