Two-Photon Exchange Effects in Semi-Inclusive Deep-Inelastic Scattering on a Nucleon *

Deep-inelastic scattering of electrons on a nucleon is a primary source of information about parton distribution functions (PDF) and transverse momentum distributions (TMD). The calculation of the QED corrections to SIDIS with any predetermined accuracy is crucial for studies of the 3D structure of the nucleon at JLab and future Electron Ion Collider (EIC). A majority of approved physics experiments that will be running with 12-GeV electron beams at JLab to study the nucleon structure require per-cent level accuracies in the measurements of differential cross sections and polarization asymmetries. Neglecting electromagnetic corrections may lead to significant mis-interpretation of data. Analysis of T-odd singe spin asymmetries (SSA) in SIDIS, p(e,e’h)X, is based on an assumption that purely electromagnetic T-odd effects are negligible.  In this talk we will present evaluation of two-photon exchange on azimuthal asymmetries and generation of electromagnetic T-odd spin asymmetries in SIDIS.