Losing a serial number is common. Here is the legitimate recovery path:
A final code sent to your registered email address after you enter the serial number and activation key during the initial setup. Official License Types and Pricing Serial Number And Activation Key For Tally Erp 9
This is the most common error. It usually happens due to typographical errors. Ensure there are no spaces before or after the numbers. If you are copying and pasting, ensure the formatting hasn't altered the characters. Losing a serial number is common
If you bought a boxed version (like Silver or Gold), the Serial Number and Activation Key are printed on the Installation Guide Digital Purchase: Serial Number And Activation Key For Tally Erp 9