Why doesn't IRS use my direct deposit account? I get refunds straight to my bank account, but the stimulus check goes via check in the mail. How do I make sure that IRS has my bank details for a direc

 Check the IRS website for status of the stimulus payment and update your bank information if necessary.

  AGI is line 7 on your 2018 return and line 8B on your 2019 return.  Refund is line 21a of the 2019 tax return. and line 20a for 2018

https://www.irs.gov/coronavirus/economic-impact-payments