God was in Christ reconciling the world to Himself, not imputing their trespasses to them, and has committed to us the word of reconciliation.
2 Corinthians 5:19
The cross profoundly demonstrates God's perfect love for us.
God knew sin separates us from Him and the consequence of this awful separation is death. But God also knew that we cannot do anything to overcome sin—and that is why God sent Jesus to save us from our sins.
Everything God requires of you for salvation was fulfilled solely by Christ alone.
It is because Jesus finished the work the Father gave Him that you are fully reconciled and brought into a right relationship with God. This brings you peace with God, knowing you are fully accepted and favourably loved by the Father.
Truth is, the cross is the reconciling place where God's holiness and justice meet God's grace and mercy. It is God who is reconciling you to Himself—without you needing to do anything more than simply to rest in Christ's finished work for your salvation.
There cannot be true reconciliation if there is still the imputation of sin.
One of the positive effects of being reconciled to God is that there is no more imputation of sin because Jesus paid in full and said, "It is finished". (John 19:30) To impute is to either credit or charge someone for something the person has done. You don't have any outstanding debt owing to God. And if God still needs to impute sin on you—after what Jesus did on the cross—and say you are still guilty of sin in some way, it means God wasn't sincere or truthful about forgiving your debt of sin in the first place.
Whenever you are defeated by sinful habits and plagued by feelings of condemnation or guilt, don't lose your faith in God's forgiving nature but lean on His grace to overcome temptation and live victoriously.