Four different Forms 1099-R, one for each year. Excess Roth IRA contributions are reported on Part IV.
https://www.irs.gov/pub/irs-prior/f5329--2017.pdf
https://www.irs.gov/pub/irs-prior/f5329--2018.pdf
https://www.irs.gov/pub/irs-prior/f5329--2019.pdf
https://www.irs.gov/pub/irs-prior/f5329--2020.pdf
