21 September 2022
LUT has to be filed before export of service. All registered taxpayers who have zero-rated supply of goods or services have to furnish LUT in Form GST RFD-11 on the GST Portal before affecting such supply.
22 September 2022
I agree with the view of Mr. Seetharaman, one has to apply for LUT before commencement of such financial year. For example for FY 2022-23 application has to be submitted on or before 31-3-2022. However keeping in mind future transactions, you may immediately apply for LUT for FY 2022-23 as the window would be open to submit.