When was the Bible altered precisely?If so where are the original Bibles? Are u aware that translations are different than modifications? The Quran is translated as well.
For sure every single Bible couldn't have been altered while they have been spread all over the World for 2000 years and ancient manuscripts (like the manuscripts of the dead Sea) have been found . Even if altered, how does that make Islam true given that it contradicts what even historians Flavius Josephus knew about early Jews and christians? Christianism being wrong doesn't automatically makes Islam right, it could only be the case if ancient scriptures, archeological and historical evidences prior to the coming of Christianity prove that what is known as Islam today(5 pillars, Kaaba as holy cite, quran, arabic as religious language, haddiths, non belief in the Messiah death and resurrection...) existed before. Secondly you'll also need to shows by quoting from the Torah and Tanakh how and why Islam came. God knows everything therefore he also knows the future, if Islam is the truth, then surely it should have been mentioned at least in the old Testament (if you consider the new testament as altered). Don't say Islam existed since forever because it means "submit to God" , christians or others could use this argument and declare themselves as the true follower of Islam then because they see themselves on the right path and submitting to God as He ordered.
What ? 
