You do not say what kind of disability income your spouse has. You should understand that her income must be included on either your joint return or if you file separate returns--on her own return. If she is receiving Social Security disability and gets a SSA1099, that income must be included on a joint return, or entered on her own MFS return now that you are married. When Social Security is combined with other sources of income, it can become taxable. Or....if you file separate returns (usually the worst way to file) then she must enter it and 85% of her SS will be taxable. Do not assume that her disability is not taxable if it is coming from Social Security.
Or....does she receive some other sort of disability income? You need to be clear on where it is coming from. Is it coming from a plan that she paid into while employed? Or from a plan that was paid for by an employer?
Disability Income
https://ttlc.intuit.com/questions/1901145-is-disability-income-taxable
When you sort out the source of the disability income, you will be more able to decide on your own W-4 and what to enter for your own withholding.
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
