Filing jointly, bigger refund when I do wife's tax first

That should not happen.  If both returns are filed Married Filling Jointly, they should be the same.

• If you prepared them on two different accounts, you can compare the tax returns to find the difference.
• If you prepared on Desktop simply go to FORM and print each return.
• If you were Online follow these steps for both returns.

From the left sidebar

1. Select Tax tools
2. Hint: You may have to minimize the Federal and State selections
3. Click Tools
4. A Menu will pop up
5. Select View tax summary
6. On the left panel click Preview my 1040

Some Key numbers to compare:

• 11 Adjusted Gross Income
• 12 Deductions
• 15 Taxable income
• 16 Tax
• 19 Child Tax Credit
• 26 Earned Income Tax Credit
• 28 Additional Child Tax Credit
• 33 Total Payments
• 34 Overpayment
• 35a Refund
• 37 Amount you owe