The "No Tax Breaks for Union Busting (NTBUB) Act" seeks to amend the Internal Revenue Code of 1986 by denying tax deductions for employer expenditures aimed at influencing their employees' decisions regarding labor organizations or collective action. This measure is intended to prevent taxpayer subsidies for activities that may interfere with workers' rights under the National Labor Relations Act and the Railway Labor Act. The bill's findings highlight that employers spend millions on consultants and other tactics to sway employee opinions, often involving unfair labor practices, and that these expenses are currently tax-deductible. Specifically, the bill adds a new category to non-deductible business expenses, covering any attempt to influence employees concerning labor organizations or activities. This includes costs associated with unfair labor practice complaints, settlements, findings of interference, and meetings or trainings where labor organizations are discussed with employees. However, the bill explicitly excludes expenses related to good-faith bargaining with employee representatives, communications with shareholders, voluntary union recognition, labor-management partnerships, grievance procedures, and legally required postings. To ensure compliance, the legislation introduces new information reporting requirements for employers. Taxpayers who incur these non-deductible expenses must provide detailed information on their tax returns, including dates, activity types, and amounts spent. Failure to report this information or providing incorrect details will result in penalties, starting at $10,000 or $1,000 per full-time equivalent employee, with potential increases for continued non-compliance. Additionally, third parties conducting such activities on behalf of employers will also be required to file similar informational returns.