Did you use the TurboTax online editions to file a prior year tax return as Married Filing Jointly? If so, you need to create a new account with a new User ID if you are now filing as Married Filing Separately - https://turbotax.intuit.com/personal-taxes/online/
Filing MFS only your spouse's name and SS number is entered on your tax return. No income from your spouse is reported on your tax return when filing as MFS.
However, if you are in a community property state the filing becomes more complex when filing as MFS. See this TurboTax support FAQ for MFS in a community property state - https://ttlc.intuit.com/community/married/help/married-filing-separately-in-community-property-state...
