Is there a way to have a form submit data to a admin control panel where the data is stored and can be rectified there? Could it also be able to export the data as excel for example?
there are 2 very popular form plugins
Both send the data to the Admin panel so you can review inside WordPress.
I know that Gravity Forms has an option to EXPORT the form entries as a CSV file.
Review Form Submissions without logging in
The other way to see all the form submissions without logging in is to open your SQL database and view the data there. Then you can save the table as a CSV.
You can try my admin panel class which is create admin panel pages for you with ease and has Import Export features.
And Available fields are: