Here's how to add tags to an existing document in Zoop Wallet:
Step 1: Begin by navigating to the document you want to tag.
Step 2: Open the document by tapping on it.
Step 3: At the bottom of the screen, you'll find an option labelled 'Add Tags.' Tap on 'Add Tags.'
Step 4: Now, you can assign tags to the document as per your specific requirements.
Step 5: Once you've tagged the document, tap on 'Save.'
By following these steps, you'll have successfully added tags to your document, making it easier to find and access when needed.