Hello. Amending 2018 return. TurboTax transmit page errors because today's date is after 12/1/2019. solution?

Amended returns can only be mailed. It is suggested that it be mailed certified with return receipt (or other tracking service) to verify that the IRS receives it.

See this TurboTax FAQ for detailed amend instructions:
https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed


You can check the status of the amended return here, but allow 3 weeks after mailing.

https://www.irs.gov/filing/wheres-my-amended-return

Thank you very much for that help.  I will handle in hardcopy asap.

Pat