“If he has committed any sins, he will be forgiven.” - James 5:15
The Sacrament of Penance is God's gift to us so that any sin committed after Baptism can be forgiven. In confession we have the opportunity to repent and recover the grace of friendship with God. -USCCB
To learn more about Reconciliation please read this article: What is Reconciliation
The Sacrament of Confession is always offered 30 minutes before every Mass. At weekend Masses the priest will usually be available to hear confessions into the beginning of Mass, if needed.