Let F be a non-Archimedean locally compact field of residue characteristic p, and let G be an inner form of GL(n,F), that is a group of the form GL(m,D) where D is a division algebra of centre F. Given R an algebraically closed field of characteristic different from p, I will explain how to classify the irreducible smooth representations of G with coefficients in R, in terms of parameters involving the supercuspidal representations of the Levi subgroups of G. We will discuss about the possibility of having a Jacquet-Langlands correspondence modulo $l$. This is a joint work with Vincent S$\mathrm{\acute{e}}$cherre.