With the ever increasing amount of precise data available for lepton-hadron processes, per- turbative QCD framework can be extended to explore effects and corrections that go beyond the next-to-leading order accuracy. We have investigated some of those corrections such as thresh- old resummation of soft gluon emission, Hadron Mass Corrections (HMC) and their interplay for Deep-Inelastic Scattering (DIS) and Semi-Inclusive e+e- Annihilation, and next-to-next-to leading order (NNLO) corrections to the longitudinal structure function for Semi-Inclusive DIS (SIDIS). We also present our work in progress towards a future NNLO fit of Fragmentation Functions.