Tally.Developer 9 is part of Tally Development Environment (TDE) subscription. You can get Tally.Developer 9 license on buying TDE subscription.
To buy or renew Tally Development Environment (TDE) subscription
1. Go to www.tallysolutions.com .
2. Click Quick Buy .
3. Select Tally Development Environment as Product Type.
4. Fill the required details in the given form and complete the payment.
Note: Provide your existing Tally.Developer 9 serial number to renew your TDE subscription.