WASHINGTON — Amazon and other online-only retailers have been dealt a major blow, as legislation introduced last week seeks to require such retailers to collect sales tax.

The Main Street Fairness Act would allow states that have adopted the Streamlined Sales and Use Tax Agreement to require out-of-state sellers to collect sales tax whether they have a physical presence in their state or not. The bill would cover all “remote sellers,” which include online retailers, catalog merchants and “1-800” offers on radio and television.