If you already filed and the return was accepted
by IRS, you have to wait until you receive your refund before you
can amend your taxes. You will amend yours by removing your spouse and your spouse will file a new paper return. He cannot e-file. You can amend your taxes any time this
year.
If your return is rejected or
not yet submitted, you
can edit any time by removing your spouse information; And your spouse will file his own and be able to efile.
See this TurboTax support FAQ for
amending a tax return - https://ttlc.intuit.com/questions/1894381-how-to-amend-change-or-correct-a-return-you-already-filed
Note that filing a joint Return will generally give you a bigger
refund or less taxes due. Your tax rate is higher When you file separately and
you won't be able to claim the following credit:
