If the amount on line 4a is the same as 4b the IRS doesn't want it showing on 4a. Same for line 5.
See IRS 1040 Instructions.
https://www.irs.gov/pub/irs-pdf/i1040gi.pdf
For line 4 page 26 top of last column……
Except as provided next, leave line 4a blank and enter the total distribution (from Form 1099-R, box 1) on line 4b.
