https://help.tallysolutions.com/docs/td9rel54/td9/working_with_projects/saving_projects.htm

Saving Projects

In Tally.Developer 9, you can save the current file either in the existing format or a different format, or save all open files in the project.

To save a file

Go to File > Save File .

The file is saved in the current file, in the existing format.

Select Save File As to save another copy of the existing file with a different name, and at a different location. The new file will become the current file in the active window.

Select Save All Files to save all the files open in the Project browser window.

Click S ave File , or Save All Files to save a file or all files within the project. These options are also available on the standard tool bar.