Netfile isnt working, is it too busy? Do you have the mailing address for CRA if needed?

[TurboTaxSusan]

What is the exact error message that you are getting?
 

This CRA webpage has a list of the mailing addresses where you can send your tax return: https://www.canada.ca/en/revenue-agency/corporate/contact-information/where-mail-your-paper-t1-retur...