In 2009, my spouse had $190,000 in income while I had $15,000, if we file jointly she will have to pay $6,600. If we file seperately she will have to pay $14,000. I would have to pay $300 filing seperately. The previous year we got a $28,000 return of which I received nothing (I moved out on tax day after signing the forms without looking) I feel my signature is worth $3000 more than what we had previous agreed upon. ($4K after a 6 year marriage, no kids, no house or joint assets)

I might lose the 4K if I refuse to sign the joint return. Am I in a legal position to without it or even in a place of power to make her give me more?

She will not go to meditation with me.