This is a pretty notable claim.
Examples (the sites are, predictably, pretty anti-Islamic to put it mildly, so the language at the links may be harsh to extreme)
Taqiyya ("al Taqiyya") is the Muslims' license to lie to infidels in order to camouflage Islam's holy war strategy (jihad) to conquer the world. The strategy mentioned through orders and solicitations in the Quran 3:28 and other Islamic writings and reference applies to all Western countries and against all infidels people (non-muslims) who is not Islamic and therefore seen as a constant threat to Islam. (source)
Question: Are Muslims permitted to lie?
Summary Answer: Muslim scholars teach that Muslims should generally be truthful to each other, unless the purpose of lying is to "smooth over differences."
There are two forms of lying to non-believers that are permitted under certain circumstances, taqiyya and kitman. These circumstances are typically those that advance the cause Islam - in some cases by gaining the trust of non-believers in order to draw out their vulnerability and defeat them. (source)
Muslims lie when it is in their interest to do so and “Allah” will not hold them accountable for lying when it is beneficial to the cause of Islam. They can lie without any guilt or fear of accountability or retribution. A lie in the defense of Islam is approved even applauded in their “holy” books. (source)
An evidence confirming this would be:
An unambiguous historical or Quranic example of a lie to a non-Muslim that was officially explained away as "OK" because of Taqiyya.
A fatwa from a notable and important religious leader stating this concept. (as in, more notable than an imam at a single mosque with 500 followers). A specific proof of author's notability is required.
An evidence denything this would be again a statement from an equally notable and important religious leader indicating that using Taqiyya is contrary to Islam and is a sin. The statement must be internally-oriented (e.g. aimed at Muslim followers of said leader, not at non-Muslim foreigners).