It’s a good news/bad news proposition: If you aren’t making sales online, this is probably good news. If you are making sales online, get ready for some bookkeeping hoops.

Congressional support appears to be growing behind a bipartisan bill, the Marketplace Equity Act, to the point that online heavyweights such as Amazon and eBay have testified before Congress on the matter.

But suppose you don’t do Web sales. Analysts point out that non-Web sellers will gain if the bill passes because online businesses have had an advantage — an unfair one, some say — because they’ve been escaping charging for and collecting sales tax.

One obstacle to the bill: A 1992 Supreme Court ruling, Quill v. North Dakota, prohibits states from forcing sellers to collect state sales taxes unless they have a physical presence in a state.