State tax filing

Okay, everyone:

Based on this information from the MO Department of Revenue website, you won't be able to pay your MO tax liability electronically.  You can pay with a check and voucher, or pay electronically using the MO website.

Here's the link to the FAQ page:

FAQs - E-Filing (mo.gov)

I'm also attaching a screenshot that answers the question, "What if I owe money?"