IRS Publication 6149 contains multi-year projections of the number of tax returns to be filed with the IRS by State — as determined by the addresses on the tax returns. The publication includes detailed projections by approximately 50 different individual, business, and tax-exempt return types, such as Form 1040, Form 1120, Form 941, and Form 990. There is also additional detail by medium of filing (paper versus electronic).
Download current Publication 6149 PDF