What do different color boxes mean in Worksheets?

Hello,

Smart Check brings me to Worksheets.  Yikes so many boxes to fill in.  Never had to do this in past years with Turbo Tax program (always CD).

What does each color mean in worksheets?

Why if I fill in reply, the color doesn't change, or the program continuously returns to same box?

So many questions about "spouse". What if there isn't a spouse?  I leave it blank or enter 0 - program keeps going back to this.

 

Turbo program has always fill in and managed my return very well. Or Community Support answers a question easily.   Not happening for 2021 or any year re: worksheets and general questions.

I have CD 2021.  Never had so many worksheets questions to fill in.  

Thank you.