kindly help me. I am issue 1 no invoice to my customer on 22.03.2019 & I file the GSTR1 on the 10th of April accordingly. But on 15 April the customer tells me to change the invoice date to any date of April Month. I am reissuing the same invoice on 22.04.2019. Kindly tell me how can I put both invoice detail in the GSTN portal.