I have never received any stimulus for my child and neither has my ex wife. We take turns claiming her year to year.

[NCperson]

whomever claims the child in 2020 should see the $1100 on Line 30, assuming you are below the income threshholds.  just enter the amount of stimulus you actually received when asked in the federal review section.

the fact that you trade of each year does not mean you two share the $1100.  it all revolves around the 2020 tax return.

it is that easy.