If you filed with TT last year, it kind of "knows" some of your credits already, so it is farther ahead of you in the process than you realize. When you entered your wife's income, assuming you filed correctly (with regard to status like "married filing jointly") then it will update the proper refund based on your taxable income (AGI). It is probably correct, but you can do the calculations yourself also if you don't trust the program. Just figure out your AGI and use this table to calculate the taxes you owe (put it in your calculator as a negative number), then add your tax credits and the amount that the government took out in taxes. That is your refund.
https://www.nerdwallet.com/blog/taxes/federal-income-tax-brackets/
