We analyze the first quarter 2007 10-Q filings of 348 Samp;P 500 calendar year-end firms to provide evidence concerning the levels of, and changes in, unrecognized tax benefits (UTBs) resulting from the adoption of FASB Interpretation No. 48 (FIN 48). We draw the following conclusions. First,...

FASB Interpretation No. 48 (FIN 48) requires firms to disclose a forecast of significant changes in unrecognized tax benefits (UTBs) that are reasonably possible to occur within 12 months of the reporting date. According to paragraph 21(d), the “look-forward” disclosure, a firm must disclose...