I cant delete submissions in bulk,

I cant delete submissions in bulk, please help

It is possible to delete all the submissions of each form by selecting Myforms > submissions > delete all submissions:

This need to be repeated for each form. Please make a backup of the submissions, else they will be lost as we don't have a copy of your submissions. 

Another option is the App Auto-Delete submissions:
http://apps.jotform.com/app/auto_delete_submissions 

This app will delete the submissions as soon as they are received, so it is advisable that it is used along with a Google Drive or Dropbox integrations:

https://www.jotform.com/help/192-How-to-Integrate-a-Form-with-Google-Drive 

https://www.jotform.com/help/77-Upload-to-Dropbox-with-JotForm 

Let us know if we can assist you further.   

I need to delete all 2014 and 2013 submissions,, how I do that in 1 action?

To delete bulk submissions, you will have to select them one by one, do do a group selection hold down the

CTRL Key and click on the records, you can also click the first record, hold down SHIFT then click the last record to select all in between.

Next click on the delete selected submissions button

340 times! ufff

To make it easier you can filter the submissions by date

After that you can enlarge the grid so most records fir into a single page, Select first record then press shift and select the last record in the grid, the click the delete selected submissions button

Hope this provides a less tedious way of deleting the data.