After you file

Did you view the IRS Form 1040 for 2018?  It stops on Line 23.
The 2018 Form 1040 has changed from all previous years.  There is now only one Form 1040 with 6 supporting 1040 schedules.  Forms 1040EZ and 1040A are not longer used.
IRS Form 1040 and schedules
<a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/f1040.pdf">https://www.irs.gov/pub/irs-pdf/f1040.pdf</a>
<a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/f1040s1.pdf">https://www.irs.gov/pub/irs-pdf/f1040s1.pdf</a>
<a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/f1040s2.pdf">https://www.irs.gov/pub/irs-pdf/f1040s2.pdf</a>
<a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/f1040s3.pdf">https://www.irs.gov/pub/irs-pdf/f1040s3.pdf</a>
<a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/f1040s4.pdf">https://www.irs.gov/pub/irs-pdf/f1040s4.pdf</a>
<a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/f1040s5.pdf">https://www.irs.gov/pub/irs-pdf/f1040s5.pdf</a>
<a rel="nofollow" target="_blank" href="https://www.irs.gov/pub/irs-pdf/f1040s6.pdf">https://www.irs.gov/pub/irs-pdf/f1040s6.pdf</a>