If I start collecting SS in the middle of a year after I have already made over 50k will I have to pay tax on my SS?
Generally, your Social Security Income will be taxable if you received substantial income in addition to your benefits during the year. Substantial income includes wages, earnings from self-employment, interest, dividends, and other taxable income that must be reported on your tax return.
If you have already made over $50,000 during the year, it's highly likely that approximately 85% of your Social Security Benefits will be included in your taxable income for the year. This is consistent with the information provided on the Social Security Administration's website here:
https://www.ssa.gov/benefits/retirement/planner/taxes.html
