IRS U.S. Tax Code, Regulations and Official Guidance webpage instructions to search the Internal Revenue Code:

If you know the section number, click Go in the middle column of the Internal Revenue Code table (under the "Retrieve by section number" heading).

You can either perform a Quick Search by entering "26" for the Title, then entering the applicable Section number; OR scrolling down and clicking the TITLE 26 - INTERNAL REVENUE CODE link. You can then browse the subtitles (the range of section numbers are also included).

Note that any link in the information above is updated each year automatically and will take you to the most recent version of the webpage or document at the time it is accessed.