I recommend using the W4 calculator. If you answer all the questions to he best of your ability, it will generate an updated W4 for each spouse that you can provide to your employers.
Here is the link to the W4 calculator: https://turbotax.intuit.com/tax-tools/calculators/w4/
As the year progresses, you can check your progress using TaxCaster to estimate your full year tax liability. Based on the result, you can then decide whether to top up your withholdings by making estimated tax payments.
Here is the link to TaxCaster: Tax Calculator - Tax Refund & Return Estimator 2023-2024 | TurboTax® Official (intuit.com)