They have a VIN decoder https://www.mgbjubilee.com/vin-decoder/
And as your MGB is a LE they may have other info regarding the car.
Although to get the Historic Tax stuff you will need a heritage certificate.
Your car must be a 1980 caras they were only produced 1962 - 1980 so you should have a good case anyway

Enjoy your MGB and welcome to the MGB Register
Don't forget to check out the Photo Album your car maybe on there, search by Our Register no #***** or maybe by the registration mark. I have also tried to seperate all LE & Jubilees so these can be listed by a keyword search.
Have Fun
Regards
Paul