Get the file from wellsfargo.com (works best on a computer):

1. Sign in and open your checking account.
2. Choose Download Account Activity.
3. Pick a date range and the Comma Delimited (CSV) format.
4. Come back here and choose that file.

Do this for each checking account and credit card, including your wife's. Card payments from checking are marked as transfers so purchases aren't counted twice. Importing the same file twice won't create duplicates.

Changing the category here also teaches future imports from this merchant.