Do you have a link to the information?
The IRS generally doesn’t collect sales tax since that goes to state and local governments. They do of course collect income tax on any income generated online, but that’s already in place.
I think if they’re going to tax online sales, it should be a flat rate for all areas. The differing, overlapping, and changing rules for taxation across the country are nearly impossible to keep straight and then tracking which organization is owed which amount that was collected is also daunting. Enforcement would be an equal nightmare from the other side.
For small retailers, making a payment to a city or county across the country for a single sale from that area is silly, but that’s essentially what would be required as I understand it.
A flat federal tax makes more sense and addresses many of the concerns of brick and mortar retailers, but then what’s the advantage for the groups that normally benefit from sales tax (state, city, local governments)?
I’m sure people more familiar with tax law are working on these problems but I don’t think it’s as simple as just saying “internet sales should be taxed” because there’s no single standard like there are in other countries.