Very unlikely they will as they’re not tax advisors, an article on one country would mean they’d have to do one for every country, and they’d need to be constantly updated to adapt to every small change in the rules across all countries.
They minimise their exposure to liability if they leave it to the professionals… I.e. a tax advisor in your own country.
But as India has a tax treaty with the US, there’s no reason why you shouldn’t be able to offset the tax you’ve paid against the tax you owe. If somebody is saying you can’t, then I’m pretty sure they’ve got that wrong.