So if you need to insert a text box to a worksheet, follow these simple steps.
First you need to go to the Developer tab. Developer tab is not displayed by default in Excel application. If you don't know how to show the developer tab, you can learn it from my earlier post
How to show the Developer tab in Excel
If you go to the Developer tab you will see a "Insert" button within the "Controls" group.
You can drag the text box to any place within the excel sheet. And if you need to change the properties of text box, then right-click on the text box and click on the Properties.
You will see long list of properties related to your newly created text box. You can change any property to suit to your requirements. Also you can follow naming conventions if you like when you give name to the text box. For an example if you use text box to get name of user, you can name the text box as txtName.