We don't always know what Turbotax does. If the program used the incorrect deduction for some customers, you may be able to prepare an amended return to change your deductions and get an additional refund. Turbotax can't file an amended return for you, even though they should know who was affected by the bug. There's no way to know how much additional refund you might be entitled to without preparing an amended return to see what happens.
You can try preparing an amended return and see if your deductions and tax change.
https://ttlc.intuit.com/turbotax-support/en-us/help-article/tax-return/amend-federal-tax-return-curr...
