The future tense of the verb ‘give’ is ‘will give.’
In English, we form the simple future tense by using the auxiliary verb ‘will’ followed by the base form of the main verb. In this case, ‘give’ is the base form. Therefore, when we want to express an action that will happen later, we say ‘I will give,’ ‘you will give,’ ‘he/she/it will give,’ etc.
For example, if I plan to hand over a book to a friend tomorrow, I would say, ‘I will give you the book tomorrow.’