Long story short- married filing jointly with 2 dependents and household combined income is approximately 155k. One income we have is 65,000 yearly the other is 90,000. the 90k income is from a new job that i am concerned isn't withholding enough as our total income last year was about 145k and our refund was much larger. How much should be withheld from 90k a year to ensure a larger end of year refund? on our W2 its about 9k withheld. and the 65k salary is about 8k withheld. Thanks.
that tool is down for maintenance...i tried already
you could wait until it's fixed or download a w-4 from the IRS website and prepare it manually'
https://www.irs.gov/pub/irs-pdf/fw4.pdf
if your 2023 adjusted gross income was under $150,000 you only need federal withholding equal to your 2023 tax to be safe from underpayment of estimated tax penalties. since you want a larger refund you could withhold an extra $2200 in federal withholding on the additional $10K of salary.
note any calculation for 2025 is a pure guess. there is talk that the new administration may change some tax laws.