Retirement tax questions

Box 2a on my 1099-R contains the text "UNKNOWN"

I used 1040-SR on TT and it places my correct income on Box 4c, but 0.00 for taxable income in Box 4d

I cashed out of the minimum required distribution for a thrift fund at age 70.5 years and so RMD section was not included.  This also results in a zero income tax for my California return according to TT.

Too good to be true?