- 3 - allowable. On the basis of those determinations, respondent calculated a deficiency in tax of $7,908 and on July 5, 2005, sent petitioners a notice of deficiency. Petitioners timely petitioned this Court for a redetermination of the disallowed amounts. Discussion As a general rule, the Commissioner’s determinations in the notice of deficiency are presumed correct, and the burden of proving an error is on the taxpayer. Rule 142(a); Welch v. Helvering, 290 U.S. 111, 115 (1933). However, pursuant to section 7491(a), the burden of proof with respect to any factual issue relating to ascertaining the liability for tax shifts to the Commissioner if the taxpayer: (1) Maintained adequate records; (2) satisfied the substantiation requirements; (3) cooperated with the Commissioner’s agents; and (4) during the Court proceeding introduced credible evidence with respect to the factual issue involved. Except for the substantiation requirements for some items, discussed infra, we find that petitioners satisfied these requirements. Issue 1. Loss From Farming During 2002, petitioners owned a 45-acre farm in Williamson County, Texas. In calculating their 2002 gross income, petitioners included a loss of $20,116, which was supported by Schedule F, Profit or Loss From Farming. The Schedule F does notPage: Previous 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 NextLast modified: November 10, 2007