I think what you mean is that you entered your spouse's W-2 but told TurboTax that it was your W-2. That could affect your tax in rare instances. You can prepare an amended return to correct the matter, as @JillS56 mentioned. There will not be a penalty assessed if you are due a refund on the amended return and you will receive the refund.
You can file an amended return using TurboTax for no additional fee. You will see the option on your Home Page in TurboTax, then under Your tax returns and documents, look for an option to Amend/Change your return. You should wait until you receive your refund or the IRS has processed your return, if you sent a payment, before you amend your tax return.
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