For a 2018 tax return, substitute the line number 4 for any references above to lines 11, 12, 15 or 16. The comments above regarding lines 15a/b and 16a/b of Form 1040 and 11a/b and 12a/b of Form 1040 are referring to these forms for years prior to 2018. The 2018 Form 1040 combines these on line 4a/b, so lines 4a and 4b are where any retirement account distributions must appear on a 2018 Form 1040.
