Have you tried the IRS withholding estimator?

https://www.irs.gov/individuals/tax-withholding-estimator

Annualize your income and use TurboTax's W-4 withholdings calculator:  https://turbotax.intuit.com/tax-tools/calculators/w4/

The tax withholdings calculator will estimate the results of your taxes so you can adjust your withholdings accordingly.

The best way to fill out the current version of the W-4 is to use the TurboTax W-4 Calculator or the IRS Tax Withholding Estimator. Both of these tools will ask you for information from your most recent pay stub (to get year-to-date information) as well as what you expect to happen with your paychecks for the rest of the year.

You'll enter information for all jobs that you have (or have had) during 2024, the number of dependents that you have, whether you have any other income or deductions, etc. Then the programs will provide you with the information necessary to fill out the W-4s for each job -- or even a PDF version that you can give to your employer.

Make sure to check for the equivalent of a W-4 form for your state withholdings as well. That is often a separate form with its own instructions.

Here is a link to the state agencies if you need to adjust your applicable state withholding:  https://quickbooks.intuit.com/learn-support/en-us/help-article/payroll-compliance/payroll-tax-compli...