many lines on the 1040 do not require details. if details are required they are on forms and/or schedules. for interest and dividends - schedule B. for self-employment schedule C. for capital gains maybe form 8949 and schedule d. for rents, royalties, income/loss from pass-through entities schedule E and there are dozens of other forms and schedules. only those required get transmitted. if there is not enough room on the form and schedule for all items TT submits a supplemental schedule or list. (even though filing instructions and maybe forms like 1040es are in the forms for filing list, they don't get submitted.
