How do I estimate the amount of quarterly tax I am responsible for as an independent contractor (sole proprietor - no business) when I will file Married - Filing Jointly? I am the independent contractor who will receive a 1099 and my spouse continues to be a W-2 employee who is already getting tax withheld via his employer. The calculators all ask for our Federal Adjusted Gross Income from our last return, but that is a total for the both of us - it doesn't seem right that I would have to pay a quarterly payment estimated on both of our incomes when mine is the only self employed income in question. Especially when his income and tax responsibility is much higher than mine. Can I estimate based on my own income from the last return somehow?
EDIT: I should have mentioned - this is the first year I will be an independent contractor so this is new territory for us.
