All data (except e-mail) is transformed to uppers but Excel answers shows upper and lowers

I added the following CSS code:

.form-textbox {

    text-transform : uppercase

    !important;

}

Unfortunately, we do not yet have an option to force users to input text in uppercase only. However, the text-transform: uppercase; custom CSS trick will only make the text display in uppercase to the user who is filling up the form. The only way to actually receive the data in upper case is if you either ask your users to fill it in upper case only, or if you get the Source Code of your form, edit it to use custom scripts which would change the text to uppercase, and then host this modified form yourself on your own website.

If you are trying to force your users to enter their text in uppercase, I'm afraid that you would need to use Source-Code of your form and add a custom script to transform all the values to uppercase. Please refer to this thread for details: How-to-capitalize-all-form-field-entries

Hope that helps. Thank you.