LOS ANGELES - The Internal Revenue Service is notifying roughly 9 million Americans who have yet to collect their $1,200 stimulus payments that their checks are available.On Friday, the IRS announced that it will mail letters to people who did not file a return for either 2018 or 2019, but still may qualify for an Economic Impact Payment.According to IRS internal analysis, these are people who don't typically have a tax return filing requirement because they appear to have very low incomes based on Forms W-2 and 1099, and other third-party statements available to the IRS.RELATED: Dozens of Austrians reportedly received COVID-19 stimulus checks in mail from US government"The IRS continues to work hard to reach people eligible for these.