You need to reevaluate the entire concept.
I haven't done community property adjustments in Turbotax, @VolvoGirl or @Critter might be able to help with data entry.
But I can definitely tell you that half your income is your spouse's and half your spouse's income is yours. If you file MFS for the next 10 years you will lose a number of important tax benefits. Your ability to contribute to an IRA is severely limited, you lose the student loan interest deduction, the child and dependent care credit (when you have kids) and a number of other deductions and credits are disallowed or reduced.
https://turbotax.intuit.com/tax-tips/marriage/should-you-and-your-spouse-file-taxes-jointly-or-separ...
So you are looking at paying a possibly significant tax penalty for 10 years on the promise that you might qualify for partial forgiveness of the loan. The most recent data is that 2% of applications for loan forgiveness have been approved. Reasons for rejection include late or missed loan payments (you have to make all your loan payments on time) and non-qualifying employment (be sure to update the program every year to make sure you still qualify). Your spouse may be locked into a job or career they end up hating. And at the end of it all, the remaining balance of the forgiven loan will be treated as taxable income in the year it is forgiven. Meanwhile you will be accumulating extra interest on the balance you aren't paying off by reason of IBR.
You really need to think about the tax money you will be losing over the next 10 years, and the real likelihood of making every single qualification for the next ten years, before you decide to do this. PSLF is not the magic bullet it seems to be and it is even less useful in a community property state.
