Will this help? See SS FAQ for working after retirement
https://www.ssa.gov/benefits/retirement/planner/whileworking.html
It says…
When we figure out how much to deduct from your benefits, we count only the wages you make from your job or your net profit if you're self-employed. We include bonuses, commissions, and vacation pay. We don't count pensions, annuities, investment income, interest, veterans benefits, or other government or military retirement benefits.
