now I understand..... I would expect that the IRS 'knows' that you are eligible for the Recovery Rebate because you are changing your filing status to CAN NOT be claimed as a dependent.
by the way, as you didn't explain your whole situation, if someone CAN claim you but didn't, then the box still needs to be checked that someone CAN claim you. if NO ONE CAN claim you, you are fine to amend.
suggest sending in the amendment and dealing with it the IRS doesn't send you the 1st two stimulus payments. You might enclose a letter explaining that while you are amending you are expecting the $1800 for the first two stimulus payments.
