i cant able to see end date in Formulas and Validations of Use Formula Fields

@Medisetti Mani Sankar Sai Kumar Can you confirm which objects the Close Date and End Date fields are on? That’s the key part you need to figure out.

Go to Setup -> Object Manager and check the object you’re actually working on. For example:

• If it’s Account, search Account.
• If it’s Contact, search Contact.
• If it’s Opportunity, note that Close Date is already a standard field there.

Without identifying the right object, you’ll just keep going in circles.