Saying "no" at work might provide you greater control over your professional destiny. To properly say "no" to your boss and coworkers, use these examples:
"Unfortunately, I have too much to do today. I can help you another time."
"I'm flattered by your offer, but no thank you."
"That sounds fun, but I have a lot going on at home."
"I'm not comfortable doing that task. Is there anything else I can help you with?"
"Now isn't a good time for me. I'll let you know if my schedule frees up."
" Sorry, I have already committed to something else. I hope you understand."
"No, I won't be able to fit that into my schedule this week."
"I would love to join you, but I'm feeling a little overwhelmed with work right now."
"I'm not taking on any other work right now. Maybe check with another department?"
"Thank you for thinking of me, but I do not wish to accept your offer."