Did you use the whole amount from your 2020 joint tax return? You should use the full amount of your AGI that is on your joint return, do not split it.
What AGI should I enter if I'm recently divorced or widowed?
https://ttlc.intuit.com/community/agi/help/what-agi-should-i-enter-if-i-m-recently-divorced-or-widow...
