Tax could provide states with about $23 billion a year in additional revenue.

Tax could provide states with about $23 billion a year in additional revenue.

Wal-Mart and Amazon back measure to let states collect taxes on out-of-state sellers.

Wal-Mart and Amazon back measure to let states collect taxes on out-of-state sellers.

Proposed rewrite could mean higher taxes for real estate, finance businesses.

Proposed rewrite could mean higher taxes for real estate, finance businesses.

Nonbinding Senate measure in support of Internet sales tax could pave the way for future legislation.

Nonbinding Senate measure in support of Internet sales tax could pave the way for future legislation.