If you return has certain forms that can't be Efiled, you want to know what forms those are.
If it's a matter of forms not yet being ready for Efile, then just be patient and wait until those forms are ready for Efile. There are actually very few forms that can't be Efiled; mostly it's a matter of waiting until certain forms are ready.
Here's more info on Why Can't I Efile My Return?
Yes, if you are unable to Efile your Federal return, you will need to mail your State return also (since it links info from your Federal return).
Click this link for more info on Tax Form Availability.
@Sassy63
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