A spouse can never be claimed as a dependent, even if disabled or if the spouse has no income. Instead you should be filing joint return so that you get the standard deduction for a married couple and all of the credits and deductions a married couple is eligible to receive.
Since you filed incorrectly, you can amend on a Form 1040X. There should be no cost unless something you enter on the amended return requires an upgrade to a higher software version.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-2021-return/L1gEU4G3X_U...
**Disclaimer: Every effort has been made to offer the most correct information possible. The poster disclaims any legal responsibility for the accuracy of the information that is contained in this post.**
