I am unable to print and mail my taxes , can you send them through email ?

TurboTax cannot mail or email your tax returns to you.  You can download a PDF of your tax returns and print them yourself.  If you do not have a printer then save the PDF to removable media and take it to a friend, relative, library or office supply store to print.

Why cannot you e-file the tax return?

See this TurboTax support FAQ for changing from mail to e-file - https://ttlc.intuit.com/community/e-file/help/how-do-i-change-from-mail-to-e-file-in-turbotax-online/01/26985

Paper returns that are mailed in must have your signature in ink ...

How to mail a return from the Online version

https://ttlc.intuit.com/community/printing/help/how-do-i-print-and-mail-my-return-in-turbotax-online...

Be sure to attach copies of your W2s and any 1099s that have withholding on them.  You have to mail federal and state in separate envelopes because they go to different places.  Get a tracking number from the post office when you mail them for proof of filing.