What is a tax prep workpaper?
Definition A tax preparation workpaper is the supporting documentation behind a return, it shows how each figure was calculated and ties it back to the source document (a W-2, 1099, K-1, bank statement, or ledger balance). Workpapers make a return reviewable and audit-defensible: a reviewer or the IRS can trace any line to its origin.
Good workpapers are about traceability. In a fragmented stack, the source documents live in one tool, the ledger in another, and the return in a third, so building the trail is manual. When extraction, books, and prep share one system, the workpaper can assemble itself.
LucaLedger keeps every line on a return traceable to its source by design, see how tax preparation works.