Where can i find the .htaccess file in magento?

The .htaccess file should be in the root of your magento.

To view hidden files in linux system
Go to Magento root folder -> In the menu bar click view tab and then check show hidden files.

To view hidden files in windows

1. Double-click on the magento root folder.
2. Select the Tools menu and click Folder Options.
3. After the new window appears select the View tab.
4. Put a checkmark in the checkbox labeled Display the contents of system folders.
5. Under the Hidden files and folders section select the radio button labeled Show hidden files and folders.
6. Press the Apply button and then the OK button.