According to Jesus, you can be forgiven all kinds of sin and blasphemy, except for one: blasphemy against the Holy Ghost.
Wherefore I say unto you, All manner of sin and blasphemy
shall be forgiven unto men: but the blasphemy against the Holy
Ghost shall not be forgiven unto men. And whosoever speaketh a
word against the Son of man, it shall be forgiven him: but whosoever
speaketh against the Holy Ghost, it shall not be forgiven him,
neither in this world, neither in the world to come. Matthew 12:31-32
But he that shall blaspheme against the Holy Ghost hath
never forgiveness, but is in danger of eternal damnation. Mark 3:29
But unto him that blasphemeth against the Holy Ghost it
shall not be forgiven. Luke 12:10
According to these verses, believers can be forgiven all things.
And by him all that believe are justified from all things. Acts 13:39
And you, being dead in your sins and the uncircumcision of your flesh, hath he quickened together with him,
having forgiven you all trespasses. Colossians 2:13
The great God and our Saviour Jesus Christ; Who gave himself for us, that he might redeem us from all iniquity.
If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.
1 John 1:9