Sales tax licenses are regulated by each individual state. Generally, they do not have to be renewed. I couldn’t find anyting on Louisiana that indicates they expire.

To sell on eBay, you don’t need any kind of license. You are supposed to collect sales tax to the people in Lousiana who purchase your goods, and for that you need a tax number. You then must turn that tax over to the state treasurer by filing a sales tax return each month.

Of the many people I know who sell on eBay, none of them collect sales taxes.

If you are a corporation selling on eBay, then you collect taxes from anyone who purchases your merchandise and is also in a state in which you have a business presence.