There should be a node modules file. if not run the following code in the terminal: npm install
If you are writing code and want it to update in the live server, remember to run the following code in terminal: npm run dev
If you are not gonna code, but just want to see how the project looks, run this code in the terminal: npm run build
plugins you can use to help with tailwind: Tailwind CSS IntelliSense & Tailwind Docs
If the tailwind code is not working, and you have tried the above, you can also look in the Problems tab and see if there are any issues there.