Do a Search for 1099-int and click on the jump-to link (Mac users must look for 1099-INT in the Topics List). NOTE: just type 1099-int and hit Enter - ignore all the suggested Search terms.
When you enter a new 1099-INT, all you need to the name of the payer (Department of the Treasury) and the amount. You don't actually have to have a 1099-INT to do this.