Export clearance with/without payment of duty

Another method to file a refund application is through Form GST RFD-01 on the GST Portal, though the approach you mentioned in your question best way.

I tried to export with duty paid for 5 months but still there is 29 Lakhs excess ITC in my credit ledger. Hence I tried to file GST RFD 01 for current period April 24 to Sept 24, but portal asked me to file GST RFD 01 from Jan 2018, though I have zero export for concerned period. 

As I do not have any Export for concerned period what I should fill in Statement 3 & what documents to upload?

Thanks & Regards,