Can the other parent and I agree to change our Parenting Plan?

Yes, you can. You two are still the parents. Except in cases involving third parties, whenever the parents agree, the Courts encourage. Most judges would rather the parents decide what is best for their child than leave it up to the judge. The Parenting Plan is a fallback provision to what you will do when the two of you cannot reach an agreement. If you would like your Agreement to become the new Parenting Plan, you can complete an updated Parenting Plan, have both parents sign it, and submit it to the Court.