Formatting/conditional formatting?

[Elle]

Hello,

I have a deadline date in one cell and a planned/rescheduled date in
another. If that is past the deadline date i want it to automatically
highlight it red?

Also I want a new cell to be inserted when the one above is filled...is this
possible?

Thank you

 

[Atishoo]

assuming that your rescheduled date is in A! and deadline date is B1 then A1
conditional format should be

cell value is greater than=$b$1

then set the pattern as red