Have Excel Complete Your Lists. Thanks for your help Nathan. Click on Ok and the list of values will appear in the form of the drop-down list.

Thanks for your help Nathan. Choose List from the Data menu and then select Create List. You can hide the worksheet containing your lists.
Put your information in a Microsoft 365 location that opens new scenarios.
If there is method for allowing to auto complete when typing the first letter in the drop down list everything will become easier. Now make sure to note down which cell you put the first dropdown list in because you will need it later on ie. Draw a List Box from the developer tab and create a list of months. Excel creates your new data list for you.