To push your changes to GitHub using Visual Studio Code (VSC), you'll need to follow these general steps:

Open Terminal in VSC: Go to the integrated terminal in Visual Studio Code. You can do this by clicking on Terminal in the menu bar and selecting New Terminal.

Check Git Status: Before pushing your changes, it's a good idea to see what files have been modified. Type git status in the terminal and press Enter. This will display a list of modified files.

Add Changes to the Staging Area: If your changes are what you want to push, you need to add them to the staging area. You can do this by typing git add . to add all modified files, or git add to add specific files.

Commit Changes: After adding files to the staging area, you need to commit them. This means you're saving these changes with a message. Type git commit -m "Your commit message here".

Push Changes to GitHub: Once you've committed your changes, you can push them to GitHub. Type git push origin . The is usually main or master by default.

If you're still confused about where the sync button is in Visual Studio Code:

In the bottom-left corner of VSC, there should be an area that shows your current Git branch. If you click on it, you'll see options for synchronizing your changes (syncing).

Alternatively, you can open the Source Control view in VSC by clicking on the icon that looks like a set of files on the left-hand side. This view should display all of your changes, and there may be a sync button there as well.

Remember, you need to have your GitHub repository properly set up with remote origin configured to push your changes to GitHub. If you haven't set it up yet, you'll need to use the git remote add origin command to set the remote origin. Replace with the URL of your GitHub repository.