If you have not mailed your return yet you can try to switch to efile. You can efile until Oct 15.
You said you efiled it in March? Did it reject? You can check your efile status here https://turbotax.intuit.com/tax-tools/efile-status-lookup/
Did you finish Efiling it? Did you go all the way to the very end and hit the big orange Transmit Returns Now button?
