i got preloved vivobook A412DA-EK352T.
where to find Microsoft Office bundled for this Asus Series?
in the box, the Microsoft ID just have 13 character. and for usual ID is for 25 character.
Are you trying to activate Microsoft 365?
If yes, please refer to the following FAQ, thank you.
You state your laptop is a used one, so there will be no guarantee that the original offers when it was new, are available now. The MS Office link provided above suggests you might only get a trial version.
Is your Windows 10 OS version activated? If you need to confirm what software licences are on your system, try running the free Belarc Advisor, and when it completes, scroll down to the Software Licences section. You can get it by going to the official Belarc site. Google search for Belarc Advisor download.