2017 and 2018 cannot be e-filed now. E-filing for those years is permanently closed. In order to file a return for 2017 or 2018 the return must be printed, signed and mailed--each year in its own separate envelope.
When you mail a tax return, you need to attach any documents showing tax withheld, such as your W-2’s or any 1099’s. Use a mailing service that will track it, such as UPS or certified mail so you will know the IRS/state received the return.