You mean file as Married Filing Separately? That is the worst way to file when you are married. Is there a specific reason you want to file separately?
See this TurboTax support FAQ for filing separately versus jointly and see the credits and deductions you will loss or be reduced and how to proceed if you live in a community property state when filing separately - https://ttlc.intuit.com/turbotax-support/en-us/help-article/taxation/better-married-couple-file-join...
And - https://ttlc.intuit.com/turbotax-support/en-us/help-article/taxation/married-filing-separately-commu...
