This page lists every known solution for the clue “Internal Revenue Service” in Crossword Challenge. Because this clue can appear in different puzzles (levels) with different required answers, we first list all the answers, then show which one appears in each puzzle below.
Internal Revenue Service Crossword Challenge Answers (All Variants)
Irs
If more than one answer is listed, open your puzzle page below to confirm the one used there.
All Known Answers for Internal Revenue Service Clue
Where This Clue Appears
Last Checked: December 28, 2025