How many responses to a fillable form can I view if I am on a trial version of FormsCentral?
By "trial" I am going to guess you have the 99 cent 1 month trial of the "Basic" plan (you are able to create more than 1 form) - the Basic plan allows you to have 500 responses in the Response table.
The "Free" plan allows 50 responses and the "Plus" plan allows 5,000 responses per form.
You can always export existing responses and then delete them so the form can continue to collect more responses.
Retrieving data ...