@amit2020, you have until the second week of July (unless you have a state filing that needs to go in on April 15) to figure this out, but here are some ideas:
If you don't want to or can't efile, but have a scanner and printer, you could scan, print and sign the signature page, re-scan it and then use a free secure service like Dropbox to upload the signed page, plus the 1040 PDF that TurboTax generates, to the Dropbox folder. Share the link with your family in the US and they could download everything and print it. Or, you might print the signature page, sign it, take a photo of the entire signature page and upload it with the TT 1040 PDF and they print/send that along with the TT PDF. (People with Adobe Acrobat could also insert a scanned image of their signature into the signature line of the TT PDF, or possibly use Adobe's verified signature service, have not tried that for something like this.)
