For 2019 I initially filed as an individual and received my refund within a week in the mail. Then I realized that I had to file as married because I got married at the end of 2019. I sent in an amended return with all of my wife's information and w2's. TurboTax predicted that our return would be significantly lower than the check I received for my individual return. I have not deposited or spent the check I received from filing as an individual to avoid using money that isn't mine to spend. Do i mail the check back to the IRS or do they mail a bill after the amend is processed?
