Check this website 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
worst case, the stimulus will be sent via physical check. They are supposed to begin processing them the week of April 24 in income order. So if your AGI is less than 10K, the checks would go out that week. Under 20k, the week of May 1 , etc.
