Compare Stimulus Check Amount 2018 vs 2019 tax return?

I had filed for 2018 tax return as single and I have already received my stimulous package as $1200 credited today into my account.
I am yet to file my 2019 tax return as “married filing jointly”, based on which stimulous package calculated amount is $2400. Can I claim for rest of the amount with IRS once my 2019 tax return is filed.