First don't expect it by 7/15 as the news is they may not start until August or later and you should get a letter from the IRS if you are eligible for the advance credit along with the particulars on the situation.
The increase in the child tax credit is effective for tax year 2021 to be filed next year, not for tax year 2020.
You may be eligible for an advance of the child tax credit to be paid during 2021.
See this IRS website for information - https://www.irs.gov/credits-deductions/advance-child-tax-credit-payments-in-2021
And this IRS website - https://www.irs.gov/newsroom/irs-sending-letters-to-more-than-36-million-families-who-may-qualify-fo...
