I tried to e-file individual returns on Friday 2/12 and the transmissions failed. When I tried to e-file them today I get the following error:

Validation Failure: Error 703: Duplicate Social Security Number: A tax filing with the same Social Security number has already been submitted - in other words, it appears you're trying to e-file the same filing twice. If you need to change this filing, you'll need to file an amended filing on paper, by mail.

How do I know if these have been successfully filed and how can I print the e-file acceptance letter?