If you have a 66 license and you did a A1 training do you need to endorse this category A1 into your license?

Yes, if you have a 66 license and completed A1 training, you typically need to endorse the A1 category onto your license to legally operate vehicles in that category. This endorsement confirms that you have met the specific training requirements for A1. Always check with your local licensing authority for precise regulations regarding endorsements.