Get your taxes done using TurboTax

Thanks.  I owe $8K in taxes for 2020.  If EIP #2 & #3 haven't arrived by 4/15, does it make sense to file for an extension, while sending an $8K check?  Just trying to keep the window open for the IRS to process 2019's return.  Also, will the shortfall for EIP#1 be corrected?  2019's income was < 2018's ... which is what the IRS used for 1st stimulus check.