Interstate Commerce Simplification Act of 2025

This bill amends an existing tax law provision to clarify that any business activity facilitating order solicitation (e.g., online ordering systems or marketing) counts as "solicitation" for sales tax purposes - even if the activity also serves other business functions. It directly affects businesses selling goods or services across state lines, particularly those operating online or with out-of-state customers. The key change adds a specific definition to Section 101(d) of the 1959 tax law, simplifying how states determine when sales tax applies to remote transactions. This is a procedural clarification, not a new tax or regulation.