Cross-border workers struggle to optimize tax deductions across multiple countries with conflicting pension rules

Cross-border workers living in one country while earning in another face complex, contradictory tax regulations that make it unclear whether retirement savings are deductible in their residence country, work country, or both. They waste hours researching or pay expensive accountants to answer a single question, and current tax software doesn't handle these edge cases. The pain is acute because pension contributions are time-sensitive (annual deadlines) and mistakes cost real money in lost deductions or penalties.