Which resources can be used to determine if a deduction is allowable?

The most reliable sources for determining if a deduction is allowable are IRS publications and the Internal Revenue Code. These materials provide detailed guidelines, regulations, and interpretations directly from the government agency that oversees tax law enforcement. IRS publications contain up-to-date information about various deductions, specifying eligibility criteria, limitations, and documentation requirements. The Internal Revenue Code is the comprehensive set of federal tax laws, offering foundational legal guidelines for all tax-related matters, including deductions.

Tax software and calculators, while useful for preparing returns, may not always provide the nuanced details required to ensure compliance with tax laws. Tax advisors and financial planners can offer personalized guidance, but their interpretations can vary and might not be based on the most current regulations. State tax guidelines are also important but focus on specific state laws rather than federal deductions, making them less relevant when assessing the eligibility of federal tax deductions. Thus, the combination of IRS publications and the Internal Revenue Code stands out as the most authoritative resources for determining the allowability of deductions.