I am freelance technical consultant for research and development. I am a registered GST client. I gave an invoice to my customer in July and received payment at the end of July. I submitted an invoice also to my client towards my technical service. I have been submitting monthly GSTR3B for June, Jully, August and September months. I filed the quarterly GSTR1 for the first quarter Apr-June which is nil. I submitted GSTR1 for second quarter Jully-Sep yesterday but failed to upload the Invoice. But the due taxes were paid through Epayment. Now my question is 1. should I upload the invoice since it is only for technical service and may not qualify for any credit...2. Can I correct my mistake and upload my inovice since there is time till the end of the month to file returns. kindly help me....
Dr. LVS