npx create-next-app@latest --typescript --example with-tailwindcss
//until nextjs 13 is in beta better to use 12.3.2 version
npx create-next-app@12.3.2 --typescript --example with-tailwindcss
npx create-next-app -e with-tailwindcss pName
npx create-next-app -e with-tailwindcss projectname
//this will create your nextjs application and integrate JIT engine and Tailwind-CSS in it.