Alternative product <form> locations
Depending on your theme, your product.liquid file may not contain <form> tags. Follow these steps to locate the correct section of code.
1. Click on the Snippets and Sections folders to show the files contained within them.
2. Within your Templates, Snippets, and Sections folders, look for a file with one of the following names:
3. Open the file, then search (ctrl or command + F) for <form.
4. Once you've found it, click on it to highlight both <form> tags. This designates the section where you will paste the code (in the image below, the <form> consists of lines 74 through 101).
If the <form> is not located in any of files listed above, you may have to look in other files with the word product or form in them.