It makes it easier if you keep it all on one post/question.
In your last question, you said you had $5932 of Federal withholding, now you are saying $7265. Why the difference?
If it was $5932 of Federal withholding, everything still sounds about right. Between the $4000 of extra W-2 income and $1400 of taxable Social Security increase, that is about a difference in $800 in taxes.
