Did you receive any stimulus checks? The IRS did send out the first and second stimulus payments to people whose only income was Social Security. If they missed you—and you did not get a first or second stimulus payment—then you will have to file a 2020 income tax return, even if you have no taxable income.
The missing stimulus will be returned to you as a refund.
The IRS began sending out third stimulus checks to Social Security recipients at the end of March. The Get My Payment tool is updated for eligible individuals once their payment is processed.
The IRS says:
Most Social Security retirement and disability beneficiaries, railroad retirees and recipients of veterans benefits who are eligible for an Economic Impact Payment do not need to take any action to receive a payment. These payments will be automatic. Like the previous Economic Impact Payments, Social Security and other federal beneficiaries will generally receive this third payment the same way that they receive their regular benefits.