If you didn't work, you can still file a return to claim the rebate. If you had no income at all (no bank interest?) you will need to give yourself $1 of fake income so you can e-file. Enter the name of a bank and put $1 of interest not on a 1099-INT. The IRS has never objected to this workaround before. Then you should be able to claim up to $1800 in stimulus rebate.
However, the rebate section of the program is not ready. There is a major update maybe tomorrow, but it might not fix all issues. The IRS won't open e-filing until January 27 so wait until then.