This is the only year there has been a problem. Per the IRS form 7206 is still in draft form. You can't file a draft version of a form. We will have to wait until the IRS approves the form. For clarification, refer to this site for more info: https://www.irs.gov/pub/irs-dft/i7206--dft.pdf
That's the IRS site for that form.
