Try deleting your DOB and SSN and re-entering them. Sometimes this will get rid of stray characters in the blanks that you can't see. If this doesn't work, there is something apparently wrong with the IRS and/or the Social Security database. You should verify with the Social Security Administration that their files agree with the SSN and DOB you are using.
If you are unable to revolve it, you will have to print and mail your tax return.
