It's never been possible to pay taxes with bitcoin in El Salvador!

Some definition pedants say that if you can't pay your taxes with a currency, then that currency is not legal tender - well, in that case, bitcoin was never legal tender in El Salvador... npbody cares!

It seems indeed that Tigo turned off Lightning payments for mobile top up, however it's not clear that its related to IMF deal. I heard rumours they are just switching LN service providers. However, there are indeed big chains in ES that are run by oppositionaries of Bukele that added bitcoin payments to their stores so there would not be any attack surface for ES administration e.g. Super Selectos. They might indeed remove bitcoin as an option, which sucks a bit, but in the long run, it's better this way.

Re:banks Most of the banks are owned by old elites and they indeed dont like bitcoin and try to impede bitcoin adoption by making it very hard for bitcoin companies to open bank accounts. But there are solutions for this in the making. They can block only for so long until they become irrelevant.