Client prepared and filed their original 2017 partnership tax return.

I prepared the amended return and indicated in section G that it was an amended return. I also checked the "Amended" box in the e-file section of the Partnership Information worksheet.

The return is shown in the EF Center as "Amended Return Marked for E-file". However, the client letter tells the client to sign, date and mail the return.

What else do I need to do for the letter to recognize the return will be e-filed?

Is it safe to assume the return is set up properly for e-filing since the EF Center shows that it is marked for e-file?

Thanks for you help.