This is a list of some of the most important beliefs of Jehovah's Witnesses as presented in the Bible. I like to tell people that what we believe is surprisingly similar, though not completely identical to the Nicene Creed. While we believe that many things that are not true were added to the altered version of the Nicene Creed, things that were truth were added as well.
The things from the Nicene Creed that we believe, with the further additions added later presented in italics, are: "We believe in one God, the Father Almighty, Maker of heaven and earth, and all things visible and invisible. And in one Lord Jesus Christ, the Son of God, begotten of the Father before all worlds...by whom all things were made; who for us men, and for our salvation came down from heaven and was incarnate by the Holy [Spirit] of the Virgin Mary, and was made man; he was [impaled] for us under Pontius Pilate, and suffered, and was buried, and the third day he rose again, according to the Scriptures, and ascended into heaven, and sitteth on the right hand of the Father; from thence he shall come again, with glory, to judge the quick and the dead; whose kingdom shall have no end...And in the Holy [Spirit]...who proceedeth from the Father...we look for the resurrection of the dead, and the life of the world to come. Amen."
NOTE: This list is not exhaustive
There is one God, the Father, whose Name is Jehovah. He has existed eternally and will exist for eternity. He is the Creator.-Isaiah 44:6; Exodus 3:15; 6:3; Psalm 90:2; Revelation 4:11
The Bible is the unerring Word of God, completely perfect as we have it today and entirely inspired of Jehovah.-1 Thessalonians 2:13; John 17:17; 2 Timothy 3:16-17
Jesus Christ is the perfect Son of God who existed in Heaven before he came to earth as an infant. He is also King of the Kingdom of God. We can only be saved by putting faith in his name.-1 Peter 2:22; Matthew 16:16; John 1:1-3; Philippians 2:5-8; Luke 1:32-33; Acts 4:12
Jesus Christ is not equal to God. He and Jehovah are not part of the Trinity. Jesus is a created being who is subordinate to the Father and does everything that Jehovah tells him.-John 14:28, 31; Mark 10:17-18; 12:29; Colossians 1:15; Revelation 3:14; John 5:19
The holy spirit is not God but is only God's power that He uses.-Job 33:4; Matthew 12:28; Luke 11:20
Only a "Little Flock" of "144,000" are going to receive heavenly life. These will rule as Kings and Priests alongside Jesus Christ.-Luke 12:32; Revelation 14:1-3, Revelation 5:9-10
A majority of faithful mankind will have the wonderful privilege of living on a perfected earth forever.-Psalm 37:11, 29; 72:16; Proverbs 2:21; Micah 4:1-4; Matthew 5:5; Revelation 21:4
Jesus Christ will come with his angels to destroy all the wicked on the earth. In the end, Satan and the demons will be destroyed for eternity.-Psalm 37:10; Proverbs 2:22; 2 Thessalonians 1:6-9; Hebrews 2:14; Revelation 19:11-19; 20:10
The dead are not conscious of anything. They are just "asleep".-Ecclesiastes 9:5; Ezekiel 18:4, 20; John 11:11-14
The vast majority of those who have died--including your loved ones--will be resurrected by Jesus Christ back to the earth.-John 5:28-29; Acts 24:15; Revelation 20:11-13
Hell is not a real place. "Everlasting Fire" only signifies eternal destruction.-Jude 7; Revelation 20:14