I have made the mistake of not completing the Init B page after pushback from gate. And obviously I'm getting the FMC message initialize weight's. I am unable to access Init B page. Please tell me I do not have to return to the gate. I am on the Beta Branch of MSFS.

Edited November 22, 20223 yr by GB Nick

You’ll have to shut the engines down.  It’s normal to not have access after engine start.  You can however go to PROG and the FUEL PRED.  There you can verify the INIT B values and enter those there. 

Yup, what Aburek said.