The 2019 tax return is not impacted by stimulus payments. The first two stimulus payments are reported on the 2020 tax return.
The Self-Select PIN could be the same from year to year. It can be used as a substitute to entering last year's adjusted gross income (AGI).
For more information:
How do I find last year’s AGI?
What is the difference between the five-digit Self-Select PIN I created last year and my Self-Select...
