Help me with my questions
1, Please pay attention to this schedule that we need to deliver the goods on 1st Oct. at the latest.2, Please heed this schedule that we need to deliver the goods on 1st Oct. at the latest.3, Please take heed of this schedule that we need to deliver the goods on 1st Oct. at the latest.Do these three sentences sound natural and mean the same thing?

Question

Answer

They all mean the same thing and your first one is the closest to sounding natural.  Here's what I would say:
Please heed this schedule and note that we must deliver the goods by October 1st at the latest.