Today, a few hundred bucks is nothing to sneeze at, especially for lower-income senior citizens. But many seniors, veterans and others are not taking advantage of the government’s economic stimulus payment because in the past, they did not need to file an income tax return, according to the Internal Revenue Service. The catch is that in order to be eligible for the payment, one must file a tax return for 2007. John Saulitis, ombudsman for the Area Agency on Aging, said that $2 million was unclaimed in stimulus money in the four-county area and $21 million unclaimed in Ohio. Campaigns are under way to catch those who can claim the cash. Ombudsman Mary Warren of Warren said that the tax stimulus check means a world to those in a nursing home, since Medicaid recipients only receive a $40 stipend a month. “I see the residents pouring over catalogs and circling things they want to purchase with their rebate.