Check the IRS website for status of the stimulus payment and update your bank information if necessary. it may be a few weeks before your record is available for updating; wouldn't surprise me if the 2019 return has to be processed first, but then again I may be surprised and you can do it now
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
