This guide will tell you where to farm for Natural Talent in Warframe. You have to follow the simple steps in this guide to farm it.
Natural talent can drop as a C rotation reward from completing interception missions on certain planets, Earth, Venus, Mercury, and Ceres.
To get C rotation rewards in interception missions, you will need to stay at least until round 4 as C rotation rewards only drop every 4th round, so rounds 4, 8, 12, Etc will give you C rotation rewards. The mod does have the lowest drop rate out of the items in its reward pool, so it’s likely going to take you a bit before you get the mod unless you get lucky on your first few attempts.