For the Artillerist, is the turret intended to get a modifier to hit based on your modifier or is it not mentioned because it doesn't?
— Todd (@fmacanadaguy) March 2, 2019
If a rule in D&D has you make a spell attack, check out the rule on making spell attacks in the "Attack Rolls" section on page 205 of the "Player's Handbook."
Short form: a spell attack roll uses your spellcasting ability modifier + your proficiency bonus. #DnD https://t.co/gqG2mPI4Wc
— Jeremy Crawford (@JeremyECrawford) March 5, 2019