How to add more attempts in a job

Hello, maybe someone can help me with that questions ... Would like to know how can add more attempts to a job based on the flow

First I create my job with 3 attempts.... After... the work fail 2 times but based on some event I need to add 1 attempt more to my job.

My question is how to get the current max attempts and add x more attempts, that is because if the event happens again need add 1 attempt more

Second question is how to fail a job with no more attempts;

Regards