If you don't have a filing requirement (and dont get Social Security) you can wait for IRS to open their registration portal for people without a filing requirement to sign up for the economic recovery payment.....or register now through the Turbotax registration portal. Once IRS opens their portal Intuit will funnel the registration info to them, since the IRS portal will be slammed and wont be able to handle the traffic.
Scroll down to the Register now button:
https://turbotax.intuit.com/stimulus-check/