How do i check to see when my refund is supposed to come back?

You can use the irs.gov/ where’s my refund that’s how you would track it

You can track the status of your return on the IRS Where's My Refund? site. That is where you will find the most up-to-date information regarding the status of your tax return and a specific date of when to expect your refund.
Per the IRS, most refunds are received within 21 days from the time a return has been accepted and a refund option is selected. 
For additional information, please see the TurboTax FAQ When will I get my IRS refund?
To track the progress of your state tax return, see the TurboTax FAQ How do I track my state refund?
Please note, if you claimed the Earned Income Tax Credit (EITC) or the Additional Child Tax Credit (ACTC) there will be a delay in processing your tax return.
Please see the TurboTax FAQ: Some 2019 federal refunds are delayed due to the PATH Act for more information.