Abstract We consider the interacting Tsallis Holographic Dark Energy (THDE), with Granda–Oliveros (GO) scale as infrared (IR) cutoff, dynamical vacuum. analytically solved for Hubble parameter, in a spatially flat FLRW universe dark energy and matter components, solution traces evolutionary path from prior decelerated to late accelerated epoch. Without interaction, model predicts $$\varLambda $...