Baptismal Regeneration in D&C 55:1

D&C 55:1 reads as follows:

Behold, thus saith the Lord unto you, my servant William, yea, even the Lord of the whole earth, thou art called and chosen; and after thou hast been baptized by water, which if you do with an eye single to my glory, you shall have a remission of your sins and a reception of the Holy Spirit by the laying on of hands

Here we see that it is water baptism that brings about a forgiveness of one's past and then-present sins in Latter-day Saint Scripture (as well as the theology of Joseph Smith). This goes against those who, isolating one comment by Joseph Smith, has made a (doctrinal) mountain out of a (non-existent) molehill about remission of sins not being effectuated until confirmation.

For articles defending baptismal regeneration from the Bible, see, for e.g.:

Christ's baptism is NOT imputed to the believer

Refuting Douglas Wilson on Water Baptism and Salvation

Baptism, Salvation, and the New Testament: John 3:1-7

Jerome D. Quinn on Titus 3:5 and Baptismal Regeneration

Chad Pierce on the Salvific Efficacy of Water Baptism

Acts 10:47, Cornelius, and Baptismal Regeneration (cf. Does Cornelius Help Refute Baptismal Regeneration? and. Was Cornelius Converted Before Acts 10?)

Baptismal Regeneration in Ephesians

Paul S. Williamson on Baptismal Regeneration in Ephesians

Andrew Lincoln on Paul's Theology of Water Baptism in Ephesians 5:26

J. Paul Sampley on Baptismal Regeneration and Ephesians 5:25-27