vided on the tam. litha eft. Steas•s Date 10 A/c When to file. Re Form 1906 with Panne 1099, 1098, or W-20 by March 1. 2004. Re Form 1n99. with Forme 5498, 5498-ESA, and 5498-MSA by May 81, 2004. Where To File Send all Informal:on returns Wad on paper following: It your principal businte.s, office