I've paid estimated taxes every year for my SSDI (and other income), but it's difficult to calculate correctly because my total income every year can be unpredictable. I heard I can fill out the voluntary withholding form, W4-V: https://www.ssa.gov/benefits/retirement/planner/taxwithold.html#:~:text=If%20you%20are%20already%20r....
Which percentage withholding should I choose - 7, 10, 12, or 22%? Please point me in the right direction on how to determine the best % withholding for me.
