Yes, Mock data will be deleted and will be replaced with Tally data if you have integrated tally by following the steps below:

  1. Navigate to Integration under Apps
  2. Click on Tally
  3. Enable two-way sync.
  4. Click on Permissions and enable toggles for Invoices, Bills & Contacts, etc.
  5. Click on Download the Tally plugin
  6. Paste the Plugin TCP file in the Tally Source Folder
  7. Complete the Config on Tally.