Can't attach copy of 8832 to 1040 when efiling. Can I efile the 1040 then submit form 8832 via mail? Or should I only mail the return including the 8832? What is best?

I filed form 8832 for the LLC.  It states I should attach a copy to my federal and state returns.  I efile federal and mail state.  Can I efile the federal and mail in a copy of the 1040 form with no attachments except the the 8832?  Or should I just mail the federal with all attachments?  How does the IRS want this done? What is the best way to file when attaching forms TT does not have in the program for efiling?