After you file

Double-check with this tool to be sure the return was efiled successfully and accepted:
<a rel="nofollow" target="_blank" href="https://shop.turbotax.intuit.com/efile/efile_status_lookup.jsp">https://shop.turbotax.intuit.com/efi...>

If that confirms it was accepted, you'll need to phone the Missouri DOR to ask a live agent there if they can find it.