What must be done if a taxpayer claims multiple income sources?

When a taxpayer claims multiple income sources, it is crucial to discuss the details with them. This engagement allows for thorough verification of all reported income, ensuring that each source is accurately represented and aligns with the taxpayer's financial situation. Understanding the details behind each income source is vital for compliance and tax accuracy.

Moving forward without verification could lead to inaccuracies in the tax return, and ignoring minor sources of income might not comply with tax laws, as even small amounts can affect tax liability. Focusing solely on the highest income source would also provide an incomplete picture, potentially missing other obligations that come from additional income sources. Engaging with the taxpayer for a comprehensive discussion is the best practice to achieve accuracy and completeness in their tax filing.