Hello,
I was able to add a text form on a product page for product customization using the following forum: https://community.shopify.com/c/Shopify-Design/Product-pages-Get-customization-information-for-products/m-p/616525/highlight/true#M30
The text input form is added above product description per the instruction; however, it is more appropriate to add the customization text box to display under a product description. The screen shot is attached for visualization.
