I purchased an additional state program and now I am getting application errors and the program is shutting down. How do I get technical assistance?

To call TurboTax customer support

https://ttlc.intuit.com/questions/1899263-what-is-the-turbotax-phone-number

Customer support is available from 5 a.m. to 9 p.m. Pacific time daily

I was able to contact intuit and get help.  I have to turn off avast to work on returns.  The person helping me was very patient and helpful.