My daughter reacts badly when we say 'no' to something.
Some children with autism do not like the word 'no'. This may be because they know it means they cannot do something they want to do. For other children, it is the actual word that they do not like. You may want to try using a different word or a symbol to give them the same information.
Your daughter may be confused as to why she has been told no - especially if it is an activity she particularly likes. If it is an activity she is going to do later on that day or week, try showing this in a timetable. This can either be done by marking a date on the calendar, or using symbols on a visual timetable.
'No' is often used when a child is putting themselves or others in danger. If it is safety issue, you may need to look at ways of explaining danger and safety issues as well as making the environment as safe as possible.
However if you are telling your daughter 'no' because she is behaving inappropriately, you may want to change your reaction to her behaviour. Your daughter may like it if you shout and give her lots of attention. It may be better to react very calmly, so that her behaviour, in time, decreases. Alternatively, you may need to set boundaries and explain where it is acceptable and not acceptable to behave in certain ways.