I'm Anne. I've been preparing taxes for 28 years, and I'll be happy to help you.
They might. The following is from https://www.ssa.gov/ssi/text-child-ussi.htm
Ineligible parent and eligible child no longer live in the same household:
If an ineligible parent and an eligible child no longer live in the same household, deeming of that parent's income stops effective the month after the month the parent (or child) leaves the household, for purposes of determining eligibility.
If the child remains eligible for SSI, determine the payment amount using income (including any deemed income) in the budget month.
You will want to check out the following links also:
Although the above links give you a pretty good idea of how much, and which type of income is counted and also what happens when the eligible child moves to a new location (her grandparent's), your best source of information would be your local SSA office.
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