The experimental program to study nucleon structure at the 12-GeV upgraded JLab using the CLAS12 detector is presented here. The focus of this paper is on deeply virtual exclusive processes, giving access to the Generalized Parton Distributions, and semi-inclusive processes that allow extraction of Transverse Momentum Dependent distribution functions. With its wide acceptance, high luminosity, good resolution and particle identification capabilities, large Q2 and xB coverage, (1 < Q2 < 10GeV2, 0.1 < xB < 0.8), CLAS12 is the ideal facility to pursue the research on the 3-dimensional structure of the nucleon in the valence region.