Whenever u commit a mortal sin, u should go. If u die with
mortal sins, u will perish in Hell.
Criteria:
In Latin Catholic moral theology, a mortal sin, as distinct from a
venial sin, must meet all of the following conditions:
1) its subject must be grave matter;
2) it must be committed with full knowledge, both of the sin and of
the gravity of the offense;
3) it must be committed with deliberate and complete consent.
Some things considered by the Magisterium of the Roman Catholic
Church to be grave matters include adultery, murder, lust,
willfully missing mass on Sunday, perjury, incredulity, and the use
of contraceptives and more.