Is it just when everyone gets equal shares regardless of need, when people get only the shares they merit or deserve (e. g., based on work or talent, or the work or talent of those who love them), or when everyone’s shares are adjusted somewhat to give all people a chance to meet their basic needs? Which principle of justice seems the most correct to you and why?

It is just when everyone gets equal shares regardless of needs.

Explanation: This is a principle of Justice from the "EGALITARIANISM" school of thought. Which says that everyone is equal, regardless of your age, position, race or achievement. This is the best principle of Justice to apply when sharing anything among group. This will bring in harmony and peace among group.

In almost all part of the world, they is always a group of people agitating for equal right and equal share among citizens. This will help to address jealousy among the rich and the poor.

Though using the principle of equal sharing may not be a good application of Moral among society in some aspects, just like paying a workman who has worked for 8hours in a day, the same amount with someone who has worked 3 hours in a day, which has the same job task and the same conditions of the task. But it goes beyond that, because our strength are not equal so our talent are not equal. So if one has more strength or is more talented, it should be best used when others are helped with it. And let it not just be an advantage to the individual, rather let it be a means of help to others, by sharing the payment gained, equally.

of what agreement it does not show

what is the tax base for the sales tax?

it should be (usually ) 6%