18 May 2018
Apply it online through your GST account,
Step 1: Login to GST Portal Step 2: Go to ‘SERVICES’ Tab > ‘User Services’ > Select ‘Furnish Letter of Undertaking(LUT)’ Step 3: Fill the details. Step 4: Sign and file the form.
After filing, a confirmation message appears. GST Portal sends this ARN at registered email and mobile of the Taxpayer by e-mail and SMS. You can click on the DOWNLOAD button to download the acknowledgement.