The user can extend the rental license either on expiry or during the promotional rental period on Monthly/Quarterly/Yearly basis by paying the requisite charges rental or upgrade to a regular license by purchasing Tally.ERP 9 license from the nearest partner or online from the website using Tally Currency or Credit Card.
To extend the rental license follow the steps shown:
Go to Gateway of Tally or Company Info > F12: Configure > Licensing
The Licensing menu appears as shown:

Select Extend Rental License
The Extend Rental Period screen appears displaying the Serial Number, Account ID, Site ID (if provided) and the E-Mail ID of the Administrator.
In the Billing Name field enter the Company name that has to be printed on the bill.
In the Address field enter the required address of the company.
In the Country field select the required country from the List of Countries
In the State field select the required state from the List of States
In the City field select the required city from the List of Cities
In the Postal Code field enter the required postal code
In the Method of Payment field select the required payment mode from the List of Payment Methods
In the Preferred Partner field select New Sales Partner
The Partner Search screen appears
In the Edition field select the required edition from the List of Product Types
In the Period to Extend field enter the period number and select the required period (Months/Quarters/Years) from the list of Periods
The Price field is prefilled to display the rental amount based on the period selected

Accept to save the details
The Credit Card Payment Gateway appears

Enter the required credit card details to extend the rental period.
In the Edition field select the edition from the List of Product Types
In the Period to Extend field enter the period number and select the required period (Months/Quarters/Years) from the list of Periods
The Price field will automatically display the rental amount based on the period selected
In the Tally Currency Key field enter the Tally Currency Key number

Accept to save the details
Tally.ERP 9 displays a message License Updated Successfully.
The License Details section of the Information Panel displays the validity period.
The validity period of Tally.NET subscription is limited to the extent of Promotional Rental License or Paid Rental License period.