I gave them one month! With employment letter states I work since XYZ, and currently employed in good standing, annual salary is $XXX,XXX.XX. Well, only one month because I took an offer from my company 2 months before Kim's interview. So, can't give them what I don't have! Visa got approved without any problem! Keep in mind, HCMC is where they ask for 3 yrs ITR.
So, It depends on the consulate. Some will ask for more some don't even look at your paystubs. You just need to be prepared for what they MAY ask for during the interview.
If you have 1 months, give them one more, 2? give them two. You have 6 months, bring 6 months. Remember, you can not give them what you don't have!
Good luck!