Let me be more specific:
1. The TT W2 entry page has a field for "Name".
2. Separately, the TT W2 entry page has a "who's W2 is this?" dropdown box where you can select one of the two spouses for a joint return.
In most circumstances, the dropdown menu is unnecessary. The user should not need to select which spouse the tax return belongs to with a dropdown menu. TT should be able to simply look at the "name" field in the W2 and match it to the correct spouse.
The "name" field and the "who's return is this" dropdown menu are not checked against each other. i.e. the user can correctly enter the name from their W2, and then accidentally enter the wrong spouse (or just miss) the "who's W2 is this?" dropdown menu.
Incorrectly assigning a W2 to the wrong person can lead to any number of problems.
The TT error-checking software does not detect this as a problem, but it should. It would be a very easy thing to implement.