There's nothing "broke" with TurboTax concerning stimulus payments; therefore one can't fix what isn't broke.
I am showing as a dependant for my spouse
Not possible. A married person can *NOT* be claimed as a dependent on any tax return, except under special circumstances which *DO* *NOT* *APPLY* to your situation. A married couple filing separate can not, under any circumstances, claim their spouse as a dependent. There are no exceptions.
affected my economic stimulus payment
Without the "EXACT" details of just "how" it was affected, it's impossible to provide you with any meaningful or useful feedback on this. But see https://www.irs.gov/newsroom/economic-impact-payment-information-center-calculating-my-economic-impa... as it might answer the question of why the amount of your payment is not what you expected.
Finally, understand that when a married couple files separate, both you you *automatically* disqualify yourselves for quite a number of deductions and credits that you would receive if you filed joint.
