With most of the big decisions for your character made, it’s time to calculate the modifiers for each of the following statistics. If your proficiency rank for a statistic is trained, expert, master, or legendary, your bonus equals your character’s level plus another number based on the rank (2, 4, 6, and 8, respectively). If your character is untrained, your proficiency bonus is +0.
For each kind of saving throw, add your character’s Fortitude, Reflex, or Will proficiency bonus (as appropriate) plus the attribute modifier associated with that kind of saving throw. For Fortitude saving throws, use your character’s Constitution modifier. For Reflex saving throws, use your character’s Dexterity modifier. For Will saving throws, use your character’s Wisdom modifier. Then add in any bonuses or penalties from abilities, feats, or items that always apply (but not modifiers, bonuses, or penalties that apply only in certain situations). Record this number on the line for that saving throw.
In the second box to the right of each skill on your character sheet, there’s an abbreviation to remind you of the attribute modifier for that skill. For each skill in which your character is trained, add your proficiency bonus for that skill (typically +3 for a 1st-level character) to the indicated attribute’s modifier, as well as any other applicable bonuses and penalties, to determine the total modifier for that skill. For skills your character is untrained in, use the same method, but your proficiency bonus is +0.