If my assumptions stated above are correct, I'd stick with 10. Now if you expect to have more than $71K of income in 2019, then 8 or 9 would be right for you. THe lower the number you claim, the less that is withheld from each of your paychecks. That increases the possibility of you owing the IRS more at tax filing time. So that's why I think 10 is right for you, provided my assumptions are right.
