I was attempting to e-file my taxes, but it says "filing status: printed" is it too late to add a state or change to e-file if it already says the whole "Congratulations you have filed your return!

If you return says filing status: printed, you can go back into your return to add a state or change to e-file (as long as you didn't mail your tax return to file it). Once your return is e-filed, you can no longer make changes.