I electronically filed a client's tax return on 3/17/2021. A notice was received from the IRS claiming additional money was due. I viewed the tax return and noticed the tax calculation was changed.  The AGI and taxable income was the same. The PDF of the tax return that was e-filed was different that the one showing on my screen. The AGI and taxable income is the same as the original filed e-filed tax return. Has anyone else have this happen? I think it has to do with the way the capital gains was calculated on the original tax return.