After you file

The Form 1040 for tax year 2018 is only one page.  Actually it is two half pages combined onto one page when formatted for printing.  The tax return for 2018 also includes 6 new schedules for the Form 1040, Schedule 1 thru Schedule 6.

https://www.irs.gov/pub/irs-pdf/f1040.pdf
https://www.irs.gov/pub/irs-pdf/f1040s1.pdf
https://www.irs.gov/pub/irs-pdf/f1040s2.pdf
https://www.irs.gov/pub/irs-pdf/f1040s3.pdf
https://www.irs.gov/pub/irs-pdf/f1040s4.pdf
https://www.irs.gov/pub/irs-pdf/f1040s5.pdf
https://www.irs.gov/pub/irs-pdf/f1040s6.pdf